Some of your pricing seems on target but nobody will pay $75 for small ball joint Upper control arms. Every 63-72 A body came with them so they are the most common. Stock torsion bars are essentially worthless except for the 5% of guys doing OEM restorations.
I've sold at swap meets for years and have found that most of the low end parts ( Front drums, 7 1/4" axles, stock torsion bars, etc) only appeal to the restoration guys. Most enthusiasts want to upgrade from those parts they already have on their cars.
10" rear drums are a good score. Somebody will want those shocks. Not me but someone will.
Good luck.