are all Miniwatt N3 amps the same?

I know that MiniWatt sells the N3 directly for $380, however there seem to be N3's here and on ebay for around $180-$200.

Are these amps all created equally? im assuming not, but at half price i figured something was up.

I bought one of these from Amazon for $208.00, with free 2 day shipping. (Amazon PRIME) I rolled in some Gold lion el84's and some NOS driver tube and WOW! Cats meow...I use it as a power amp, with an Accuphase C-200 preamp and Martin Logan LX16 speakers with and M&K sub. You would have to hear this set to believe it. Miniwatt N3 rules!

I would not use this with out a good preamp though..