When you are at that price level, the pictures need to be numerous and very good. There should be no hassle when posing questions, and there shouldn't be an argument over providing more information. I can see buying a $20 junker and being told "it is what it is - take it or leave", but when we're talking many hundreds and into the thousands of dollars, it should be a top-flight sales effort. You're playing in the big leagues when you're talking that kind of money.
I have several hobbies and the old bike hobby, in my experience has one of the higher rates of dishonesty, at least the hobbies I participate in. I regularly see sales or auctions, on the CABE, on eBay, craiglist, facebook, for old bikes or parts where there are serious red flags. We've all been bitten at one point or another.
I was once bitten by a CABE member sale on a pre-1930 antique bike that looked good in the photos. The one angle that was missing was the angle that would have told that a car backed into the non-driveside chain stay. I was angry when I saw damage. I never had any redress and I wound up selling the parts to break even. The seller was also, from what I can tell, using Postal Money Orders to evade federal income taxes. I'm glad I at least broke even by parting what was left of it. I've repaired and ridden vintage bicycles since 1994 and this happened in about 2012, so you're not the first and won't be the last to take a hit. We all live and learn.