On "Agyutt bought my friend this Vasilyev after the auction. Was exhibited a large collection of gouaches. It turns out that all fake?
http://www.aguttes-coissard.com/resultats/index.htm
I do not think that just one auction exhibited a large collection of fake work. They are usually diluted bidding.
The site "Agyutt" manifest putannitsa the totals prices. Many of the lots is incorrect price.