1500 is a good figure for the right amp (500 was unrealistic for anything of good quality)
much to choose from in the used market at that price level
https://www.audiogon.com/listings/lisae7hj-classe-audio-ca-101-solid-state << -- a good 'un, but given age you might have it checked out by a tech, still, it should come in under 1500 all in...