In the internet like on Ebay but not only there you may find a lot of tempting offers for high-end equipment including Magnepans, Quads, amps, you name it it's there. Most are from integer people but a large number of offerings are from scammers.

They offer desirable goods at a to-good-to-be-true price. Probably, in most situations they don't even have the advertized ware. If you bid the auctions are cancelled. The ads are intended to lure you into shady business and to rob you of your money.

The scammers use hacked usernames. Also they create usernames and feedback over a longer period of time, thus cultivating a good image that will be abused in deals that will generate money.

A site dedicated to Ebay scammers can be found here, tips to avoid being scammed are listed here.