Here's the parts list from the original thread I referenced when building mine:
https://docs.google.com/document/d/1...Aj7xa0eX0/edit
The motors are less than $10 on Amazon:
https://www.amazon.com/LYWS-Gear-box.../dp/B00NDZ0FOA I think I paid around $15 for mine, LOL.
Speed controller:
https://www.amazon.com/Controller-Du...9ETECDHNG78ABX (I think this is the right one, just going by the photo)
Power Supply:
https://www.amazon.com/LEDMO-Switchi...69VRWBSMQHPGH9 (Again, I *think* this is the right one/right size)
Those are the three most expensive components. I only used one speed controller. My feed drum runs wide open whenever there is not a case in front of the inductive sensor (the orance "spot" at the bottom of the feed ramp) and stops as soon as a case is waiting for the cake pan annealing drum to complete its revolution. The only speed controller is for the cake pan drum. So with 2 motors/1 speed controller/1 power supply, you're at $60-65 for the major components. The thread I referenced above has some great tips/tricks/mods that others have incorporated into their annealers. For me it was a fun project and in the end, it works great. Well worth the time and small cash outlay to build mine. If you prefer to buy vs. build, I'd go with the Annealeez:
https://annealeez.com/product/annealeez/