Part class

items/Item.js

@@ -1,12 +1,15 @@
+const Part = require('./Part')
+
 module.exports = class Item {
   constructor (name) {
     this.name = name
-    this.url = `${this.name}_prime_set`
+    this.set = new Part(name, 'set')
+
     this.parts = []
     this.addPart('blueprint')
   }
 
   addPart (part) {
-    this.parts.push({ part, url: `${this.name}_prime_${part}` })
+    this.parts.push(new Part(this.name, part))
   }
 }

items/Part.js

@@ -0,0 +1,15 @@
+module.exports = class Part {
+  constructor (set, part) {
+    this.part = part
+    this.url = `${set}_prime_${part}`
+  }
+
+  async getPrice (page) {
+    const marketUrl = 'https://warframe.market/items/'
+
+    await page.goto(marketUrl + this.url)
+    const element = await page.waitForSelector('b.price')
+    const value = await element.evaluate(el => el.textContent)
+    return Number(value)
+  }
+}