$200 on ebay for HCA1000a
Power amps are available on ebay all the time. Unlike receivers that need to decode all of the latest digital bitstream formats, older poweramps are just as good as newer ones. Used power amps are great deals to drive a set of TN1220's.
I got my HCA 1000a on ebay for $200 (including shipping).
My BFD EQ box was about $100.