Here is a little trick I use when dealing with junk yards. I tell the parts guy I need some "interior parts" and then grab a bunch of stuff and put in a cardboard box. Some of it is junk that I wont use but looks official and clogs the visual cortex. Along with these parts there might be a TPS.... or a Power steering idle kick up valve... or an ignitor.. perhaps a fuel rail. One or two things will happen at the parts counter for check-out. The guy will quickly glance at the box and say something like $20... or he'll pick through it and catch the expensive parts. If he catches them and snorts out an inflated price I just decline to buy them. Thats my meathod.

Good used part site... saved that one to my favorites