Hi there, Topper!
I see you have the Omni now. For better or worse :) I wish you luck with it. I'm sorry to hear he wasn't forthcoming with you. I sure was with him- he talked me pretty low on the price in addition I repaired a few further things for him. He really really had wanted it, didnt even want to test drive it before paying. He even insisted on driving it to IL... I said I didn't think that was the best idea, but, whatever I guess.
I'd be interested to know what the problem ends up being. Myself- I just reached a boiling point with it. It wasn't even the car, but some sort of wierd cosmic bad luck with me AND the car together. From being treated absolutely horrendously at any shop I went to... I burned bridges at at least 4 shops I'd been frequenting for a few years. I don't know what it was- something about that car begged people to try to rip me off or shrug me off. That last shop, I took it in for a dyno and they wanted to do engine work that wasn't required.
ANYWAY... I don't think I have a copy of the eBay auction that went with the sale to him, but it was about 4 pages long with about 40 pictures (I still have the pictures). Obviously I'm by no means a mechanic, but if I can help resolve anything with the car, I will try- just let me know. I hope he gave you the huge pack of reciepts for parts? If not, and you have issues, I should be able to confere with O'riellys for you.
I had tracked down the two previous owners on here as well, but not too much info to help.
As I sold it I had done:
Radiator and hoses
left front hub assy.
All new vac lines under the hood with check valves
Left cv assy.
Both front tie rods
New rod for actuating the brights
Bought but didn't install new timing cover
New lift struts in back
New interior lighting bulbs
... And that's all I can think of off the top of my head.
I ended up buying a 2009 ford focus ... Hate to say it, but I think the omni turned me off older cars all together :)
So, just wanted to say hi and that I was still getting the emails from this post. Good luck with it, and let me know if I can help with its history or what not.