I agree with sub. Sure, some day the planets might line up and you find another. But then again, they just might not. A few months ago I found a DFS 230 kit on E-bay that I had been looking for for a few years. But I lost my connection the weekend it was due to finish and it went for £10. A week alter another came up. This one I was determined to have, and it cost me £30. Ye I was a bit miffed that I had payed 3 times the other one, but that was out weighed by the fact that I finally had it.
I know you have plans to build it, so as long as you can afford it and you can justify it to yourself, then that's the main thing.
As the saying goes. Something is only worth what someone is ready to pay for it.