It seems that the Chinese are making knock-offs of Gibson Guitars and people in the USA are buying these and selling them online.
Gibson has a page showing the differences and what to do if you get stung:
Gibson Leads Industry Fight Against Counterfeit Gibsons
Last year, 15-year-old Jonathan Jakubowski of Cary, North Carolina emptied out his savings account to purchase a Les Paul he found advertised in the local newspaper.
Of his decision to buy a Gibson, Jakubowski explains, "Eric Clapton is my main influence, and he played Les Pauls for a long time."
Intending to purchase the advertised Les Paul Standard, Jonathan and his father visited the seller at his house, where they were persuaded instead to purchase a Wine Red Les Paul Custom, which the man said he'd bought off a traveling musician. Jonathan paid the man $1,000 for the guitar, but once he got it home, he could tell that something wasn't right.
"I'd only played Les Pauls in the guitar shops, but something tipped me off, and I ended up going on the Internet to see what some typical signs are for a fake guitar," Jakubowski says. "The first thing that struck me was that there were three screws in the truss rod cover instead of two."
The staff at a local guitar shop confirmed Jakubowski's suspicions -- the guitar was a counterfeit. The high school sophomore alerted police, and following an investigation, the North Carolina man who'd acquired the guitar from a Chinese website and resold it to Jakubowski was arrested on two felony counts of criminal use of a counterfeit trademark.
The photos on the website make it pretty obvious which is which.