Erotic 
collectibles generally aren’t showcased in the living room — they’re something most people would only brag about to close friends. But if you know the market, they can be curiously lucrative.
Odds are that porn DVD you bought online will never appreciate — even 50 years from now. But the sex industry has a deep history in various forms of culture and at various stages of media. That has proved enticing to certain collectors.
Chris Morris: Journalist 