Thoughts on ATI 1505- 5 Channel Power Amplifier

I'm looking for a used powerful 5 channel Amp and thought on ATI 1505 if the price is right.

There are many good reviews about this amp.

Quick questions:

1-How much is the Amp worth it today and considered as a great deal?

2-In other words what would you pay for a fully functioning ATI 1505 today?

Thanks