Stay away from ebay sellers that use Western Union! They can't solicit those kinds of sellers because they're not using eBay's PayPal stuff, and can't cover any loss of funds.
If you want a bargain, go with a Yamaha RX-V2500 (or 2600 if you need HDMI and video stuff) and use it as a pre-processor, then use it with an external amplifier. That way you can upgrade your amplification and speakers later, without investing in a new receiver.
2500 runs around $500 street, $800-1000 mainstream.
2600 can't be had for less than 800, I'm thinking, but it would be worth it for future investments in equipment.