yeah, I've got one on my substage right now. Only thing is arc doesnt' authorize online sales at all. If he has a dealer he can probably get one near 450, depending. Or quite a bit cheaper online with no warrantee, I payed quite a bit less than 450 for mine. Might not be enough power for 2 R's though.
for $450 you could get a new pa silver amp. dont trust the ratings, they are a bit higher than in reality. good rule of thumb, for every 1500rms they say, you most likely get around 1000-1100. still a good bang for the buck, and its new with warrenty.