CAL CL-2500 5-ch amplifier. 500x5 into 8-ohms. This beast was $8k in the 90s and is a rare sight today. Rave reviews throughout the web with the only Achilles heal being the low power housekeeping board failing. This amp has had the low power board rebuilt with the common failure points changed to include heatsinks, higher temp capacitors, and a different type of cap in select places. All 5 channels work as they should, and the amp sounds wonderful.
These sell for $2500-3500 without the updated low power board, so this is priced under market value. Not to mention its size and 100lbs weight means a fortune to ship.