I remember one guy on ebay, selling old epic models (mainly land raiders), they were not recasts, but had really bad pictures and really bad description, but they were listed under epic. Many people bought the models thinking they were 40k models and bidding huge amounts of money.
The seller made his feedback private and bidders private, so other buyers could not warn potential new buyers.
While this seller did nothing criminal it was clearly taking advantage of other people.
While this is clearly not the same as recasting, this case just got myself thinking of how easy people cheat other people on ebay. I think it is always important to take really care if buying rare pieces.