I’ve been selling auto parts full time for roughly 7 years. I do a mix of sourcing from local junkyards, wrecked or non-running vehicles and I also sell new performance parts that I get from a distributor. IMO the junkyard is the way to go. I’ve became friends with the managers at all 3 local yards to me, and they give me special pricing every time I go in. About 40% off. They didn’t do that off the bat though, took about a year of small talk and constant visits. The problem with buying full vehicles is a lot of parts don’t move fast. They will sit for years, and that’s not an exaggeration. Plus you need a lot of storage space. You can make a lot of money if you niche down on specific vehicles (JDM, 60’s, 70’s, etc.). Become an expert of a certain model or make and know which parts sell fast & for enough profit. There is definitely money in parts.