If everything is in nice condition, they aren't that far off the value. The Sphinx decals are rare. And the puzzle box of accessories he describes sometimes sells for a LOT of money just by itself (upwards of $150.) It's a little high, but probably worth every bit of $300 or $350 if both machine and cabinet are in pretty condition. The treadle belt is no big deal at all. Probably just needs to be sewn together, not even replaced.