The Gibbs on eBay right now is up to $325...with four days to go...with box and instructions.
If you are looking for a Gibbs for a collection, you are going to want to pay the price, at least on eBay. If you are looking for a good jointer for actual use on saws, you can get excellent results with a NON-long jointer, especially if the saw has not been abusively filed in the past...and there are techniques you can use even if it has been!
There are perfectly good brand name combination tools (like the Simonds 342 (jointer, raker plate, pin gauge)) out there for under $50 on eBay, and if you skip the pin gauge, under $10.
Of course, if you put a nice 513 or 503 up on eBay, you will be able to afford the next Gibbs that comes up...just look at what others are getting for equivalent saws!