A neighbor would had seen me brewing on my driveway but whom I hadn't previously met gave me two half barrel sanke kegs, 4 Cornelius and 3 Challenger ball lock kegs, 1 pin lock keg, and 5-lb CO² tank with a Taprite reg. All of the Challenger kegs had dome lids with the weird PRVs, so I replaced those lids. For the ball lock kegs, I replaced all of the o-rings, a couple plastic gas dip tubes, and the PRVs and lid seals on the kegs that didn't get new lids. I also ordered a couple extra poppets for each brand. All in, about $120.
The tank had an expired inspection date, but my local Airgas took it and didn't charge me the testing fee. I pointed out the date and the guy shushed me.
I can't even give away that pin lock keg. The half barrel sanke kegs went to my club. I expect I'll sell most of the kegs to guys in my club for cost of the parts. I can't use this many.