Everbody's definition of a good deal is different but I would say it's a little high. My rule of thumb is about half current retail. A quick looks says you can buy a new Grizzly for about $600. They have fairly frequent sales too where you might reasonably expect to pay something on the order of 525 (maybe). And the current one will have features and refinement that a 2003 model doesn't have. But shipping will add to the Grizzly price.
I would say $300 is a more appropriate price but they may have built a little room into the advertised price for negotiation too.
If you paid $600 and $100 shipping for a new one then that price is not bad.
I saw someone locally was trying to sell a Harbor Freight model for $250. I was not ready to buy but that price seemed a bit high to me too.