I purchased, resealed, played and sold 4AM, last year.
Didn't like it, Contax bayonet, grip and focusing is not my cap of tee, at all. Feels awkward to me.
I purchased, repaired and sold several FSU cameras since previous year.
Almost nobody wanted Zorki, Moskva and FED-2 here. But Kiev 4AM, which is considered to be worst in quality among those Contax copies, was sold by same day and I was receiving e-mails with offers for a while after.
I have my used, cheap Bessa R delivered to my place, by previous owner, because no local interest.
Where are few "user" Barnacks in Toronto for sale under very good price, listed for a while now.
So, this advert might be right, have no clue why people likes FSU-copy-Contax here so much.