Monster Amps, why so cheap?

Thanks for the input, now I need to decide if I want to go with the 3 channel and the 2 channel, or just find the monster 5 channel. I will be using this for a second home theater system upstairs, with occasional 2 channel listening.

The five channel is new, and won't be discounted as much.

I've seen a very few on e-bay go for under $1500, but was afraid to buy because unsure how good they were. I guess I should have bought one and tried it.