I could sell it but busy with harvest for the next month or so. You might try to get an idea what the shipping cost would be. I've never shipped anything of that size to Europe.
Closest I can come is a 1995 M900 in Diamond Black metallic with Violet Pearl Hyper-Highlight. I purchased it new and it has very few miles on it. I will have to check if it's 20" or 22".
I have a 2000 model XR800, silver, in near NOS condition. As far as I remember, there are some minor scuffs on one or both of the 105 STI levers but that's the only thing that comes to mind as far as damage. Located in central USA.
My experience is that if you like a 60 cm road frame, the 58 CX frame leaves you way too leaned over (extreme saddle to bar drop). The later aluminum Taiwan made frames are much better in that regard.
Are the SunTour parts you listed in your last post for sale? I understand that it's becoming increasingly difficult to put a well functioning SunTour group together, and XT/XTR is certainly a great alternative.
I wish I could give you an accurate estimate, but the only thing I can suggest is to look at what's sold recently on eBay. Another place where one might have sold is the Paceline forum. That's a USA based forum and there's lots of Campagnolo traded there.
I have a new pair of 32 hole single eyelet Syncros disc rims in the attic. They are white, which might fit in with the graphics on the bike. Not sure when I will be coming your way. I could easily get them to Geneseo, which wouldn't be much farther if you were visiting Wright's.