Where is the most trustworthy place to order replacement parts?

I always order my replacement parts from Ifixit.com

I've never had any issues with their equipment because they test them before sending you the parts. I would be careful when buying from Ebay or Amazon because most of the time the parts are coming from other countries and they don't work as advertised. I've been there.

Hope that helps :)

The most trustworthy places to buy replacement parts are definitely iFixit, Amazon, Newegg, etc. But however you can order parts at very little cost if you get them off of eBay, just make sure it is a reputable seller. Hope you find this useful:)