diff --git a/changelog.md b/changelog.md
index 6e3395e..0e0ce42 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,6 @@
 # The Modding Tree changelog:
 
+- Added buyable purchaseLimit.
 - Amount is automatically supplied to buyable cost and effect functions.
 
 # v2.4.1 - 4/29/21
diff --git a/docs/buyables.md b/docs/buyables.md
index 97c39de..30e217d 100644
--- a/docs/buyables.md
+++ b/docs/buyables.md
@@ -35,7 +35,7 @@ Features:
 - cost(): cost for buying the next buyable. Can have an optional argument "x" to calculate the cost of the x+1th purchase. (x is a `Decimal`).
     Can return an object if there are multiple currencies.
                     
-- effect(): **optional**. A function that calculates and returns the current values of bonuses of this buyable.  Can have an optional argument "x", similar to cost. 
+- effect(): **optional**. A function that calculates and returns the current values of bonuses of this buyable.  Can have an optional argument "x" to calculate the effect of having x of the buyable.. 
     Can return a value or an object containing multiple values.
 
 - display(): A function returning everything that should be displayed on the buyable after the title, likely including the description, amount bought, cost, and current effect. Can use basic HTML.
@@ -49,7 +49,9 @@ Features:
 - buyMax(): **optional**. A function that implements buying as many of the buyable as possible.
 
 - style: **optional**. Applies CSS to this buyable, in the form of an object where the keys are CSS attributes, and the values are the values for those attributes (both as strings).
-         
+        
+- purchaseLimit: **optional**. The limit on how many of the buyable can be bought. The default is no limit.
+
 - layer: **assigned automagically**. It's the same value as the name of this layer, so you can do `player[this.layer].points` or similar.
 
 - id: **assigned automagically**. It's the "key" which the buyable was stored under, for convenient access. The buyable in the example's id is 11.
diff --git a/js/Demo/demoLayers.js b/js/Demo/demoLayers.js
index b54d3d6..8787a49 100644
--- a/js/Demo/demoLayers.js
+++ b/js/Demo/demoLayers.js
@@ -175,7 +175,7 @@ addLayer("c", {
                 display() { // Everything else displayed in the buyable button after the title
                     let data = tmp[this.layer].buyables[this.id]
                     return "Cost: " + format(data.cost) + " lollipops\n\
-                    Amount: " + player[this.layer].buyables[this.id] + "\n\
+                    Amount: " + player[this.layer].buyables[this.id] + "/4\n\
                     Adds + " + format(data.effect.first) + " things and multiplies stuff by " + format(data.effect.second)
                 },
                 unlocked() { return player[this.layer].unlocked }, 
@@ -189,6 +189,7 @@ addLayer("c", {
                 },
                 buyMax() {}, // You'll have to handle this yourself if you want
                 style: {'height':'222px'},
+                purchaseLimit: new Decimal(4),
                 sellOne() {
                     let amount = getBuyableAmount(this.layer, this.id)
                     if (amount.lte(0)) return // Only sell one if there is at least one
@@ -360,7 +361,7 @@ addLayer("c", {
         },
         tooltip() { // Optional, tooltip displays when the layer is unlocked
             let tooltip = formatWhole(player[this.layer].points) + " " + this.resource
-            if (player[this.layer].buyables[11].gt(0)) tooltip += "<br>" + formatWhole(player[this.layer].buyables[11]) + " Exhancers"
+            if (player[this.layer].buyables[11].gt(0)) tooltip += "<br><i>" + formatWhole(player[this.layer].buyables[11]) + " Exhancers</i>"
             return tooltip
         },
         shouldNotify() { // Optional, layer will be highlighted on the tree if true.
diff --git a/js/components.js b/js/components.js
index b53f088..e111c03 100644
--- a/js/components.js
+++ b/js/components.js
@@ -257,8 +257,8 @@ function loadVue() {
 		props: ['layer', 'data', 'size'],
 		template: `
 		<div v-if="tmp[layer].buyables && tmp[layer].buyables[data]!== undefined && tmp[layer].buyables[data].unlocked" style="display: grid">
-			<button v-bind:class="{ buyable: true, can: tmp[layer].buyables[data].canAfford, locked: !tmp[layer].buyables[data].canAfford}"
-			v-bind:style="[tmp[layer].buyables[data].canAfford ? {'background-color': tmp[layer].color} : {}, size ? {'height': size, 'width': size} : {}, tmp[layer].componentStyles.buyable, tmp[layer].buyables[data].style]"
+			<button v-bind:class="{ buyable: true, can: tmp[layer].buyables[data].canBuy, locked: !tmp[layer].buyables[data].canAfford, bought: player[layer].buyables[data].gte(tmp[layer].buyables[data].purchaseLimit)}"
+			v-bind:style="[tmp[layer].buyables[data].canBuy ? {'background-color': tmp[layer].color} : {}, size ? {'height': size, 'width': size} : {}, tmp[layer].componentStyles.buyable, tmp[layer].buyables[data].style]"
 			v-on:click="buyBuyable(layer, data)">
 				<span v-if= "tmp[layer].buyables[data].title"><h2 v-html="tmp[layer].buyables[data].title"></h2><br></span>
 				<span v-bind:style="{'white-space': 'pre-line'}" v-html="tmp[layer].buyables[data].display"></span>
@@ -469,6 +469,7 @@ function loadVue() {
 			maxedChallenge,
 			inChallenge,
 			canAffordUpgrade,
+			canBuyBuyable,
 			canCompleteChallenge,
 			subtabShouldNotify,
 			subtabResetNotify,
diff --git a/js/technical/layerSupport.js b/js/technical/layerSupport.js
index 3b0a936..2748399 100644
--- a/js/technical/layerSupport.js
+++ b/js/technical/layerSupport.js
@@ -118,7 +118,9 @@ function setupLayer(layer){
                 layers[layer].buyables[thing].layer = layer
                 if (layers[layer].buyables[thing].unlocked === undefined)
                     layers[layer].buyables[thing].unlocked = true
-            }
+                }
+                layers[layer].buyables[thing].canBuy = function() {return canBuyBuyable(this.layer, this.id)}
+                if (layers[layer].buyables[thing].purchaseLimit === undefined) layers[layer].buyables[thing].purchaseLimit = new Decimal(Infinity)
         }  
     }
 
diff --git a/js/utils.js b/js/utils.js
index 920d77e..a79c83c 100644
--- a/js/utils.js
+++ b/js/utils.js
@@ -16,6 +16,11 @@ function canAffordUpgrade(layer, id) {
 	return canAffordPurchase(layer, upg, cost)
 }
 
+function canBuyBuyable(layer, id) {
+	let b = temp[layer].buyables[id]
+	return (b.unlocked && b.canAfford && player[layer].buyables[id].lt(b.purchaseLimit))
+}
+
 function hasUpgrade(layer, id) {
 	return (player[layer].upgrades.includes(toNumber(id)) || player[layer].upgrades.includes(id.toString()))
 }
@@ -152,7 +157,7 @@ function buyMaxBuyable(layer, id) {
 function buyBuyable(layer, id) {
 	if (!player[layer].unlocked) return
 	if (!tmp[layer].buyables[id].unlocked) return
-	if (!tmp[layer].buyables[id].canAfford) return
+	if (!tmp[layer].buyables[id].canBuy) return
 
 	run(layers[layer].buyables[id].buy, layers[layer].buyables[id])
 	updateBuyableTemp(layer)