Output to file

items/Part.js

@@ -1,7 +1,8 @@
 module.exports = class Part {
-  constructor (set, part) {
+  constructor (set, part, amount) {
     this.part = part
     this.url = `${set}_prime_${part}`
+    this.amount = amount ?? 1
   }
 
   async getPrice (page) {
@@ -10,6 +11,6 @@ module.exports = class Part {
     await page.goto(marketUrl + this.url)
     const element = await page.waitForSelector('b.price')
     const value = await element.evaluate(el => el.textContent)
-    return Number(value)
+    return Number(value) * this.amount
   }
 }