My buddy at Radio City tells me that they took in a TR-751A on a trade. When it came in, it had the bad volume pot. But he found a suitable sub and replaced the pot. Now, instead of push on/off, it's turn past a click to turn on. Anyways, now it has a working volume pot. It's priced at $280, which is within the $250 to $350 that ebay gets. 73 Bruce W9FZ