They're 17"s and Avant-garde is a decent spec, same as my old one.
There was a white one on Ebay, facelift '61 250 petrol, manual (rare as the proverbial...) for about 3k, 2owners full history. Only catch was 200+k miles... First owner used it to commute to Italy, and the seller used it for Airport work.
Must have sold as I can't find it now
Basically, you need to be ready to pounce if summat pops up, especially petrol ones.
E500s are relatively good value, but neet to be either pre 2006 or late 2008 to avoid the early M273 issues
if the eml is on and the chain rattles, run away.
I would still have a used E Class over a newer BMW though
Also, the S500 might be a contender, but with the same caveat re the V8. 2009 seems to be a sweet spot. Post 2010 facelift cars get the 4.7 twin turbo which comes with the turbos in the V rather than on the outside. They make decent power but, as any Audi owner will tell you, are a maintenance nightmare.