Depending on your time preference for income, it is within your interest to at least search ebay for listing prices on your parts. I believe the key is to store a decent supply of a part (like hard drives) and do all the searching and listing for one that part at the same time (it helps save time). I have two stations in my basement, a disassembly station and an office type bench that i use to test equipment, rebuild equipment, take photos and list parts.
Also, if you don't have the means to test certain equipment you can always sell them in lots as "untested"
Bookmarks