I got a better solution. Just spoke to seller. His "Dad" did all the maintenance. He is young. I said "Look, most people would say 'hey, your problem'" But, #1, Dad doesn't know you're selling the bike based on a check (I gave him a check), #2, you can hide little things like maybe a lose spoke, or a broke off knobbie, but a ****ING CASE CRACK AND A LEAKING WATER PUMP?
He's coming to get his bike Monday.
Assuming that he'll do that, give me my check, and you go find someone else. He works at a prefab shop for airplanes, and could get this fixed himself, but at this point, I'll just move on. If not, I'll take him to small claims court just to scare him.
I do appreciate the help. And, I do have some mechanical skills, such as brake pads, filters, etc. And I don't abuse my bikes. But I don't have a lot of tools, and I don't have a buddy with skills (people like yourself) to stand over my shoulders to say "make sure you don't forget to tighten screw #4 before you put the spring back on the watchamathingy, or else you'll.......
If I repost, it'll be because dude won't come pick up the bike, and I have to fix it. But I told him, if I take it to a dealer (yes, I know, I'm an idiot if I had to) to get all this fixed, that's 1000-1500 bucks, easy.
After this blows over, I've learned my lesson. Either A. Bring your buddy who knows what to look for or B. Buy new