What's It Worth - A80 Quattro (G,H,J reg) ?

[TheTwelveQuidKid]

I've been offered the possibility of a px on my XJ40 against an Audi 80 Quattro. I can't remember the year of registration, but possibly G, H or J.
I haven't the slightest idea what they're worth. It's got plenty of MOT, and just had the water pump and cambelt done. It's a V6.

I've seen the car a few times and it's fairly tidy, with potential to be excellent. There's slight bubbling on the front wheelarches.
It's been suggested that the owner would give me the car plus some cash for the jag (L reg 1993, 3.2 sport)

Any info gratefully received.