Ok, so I was looking for something specific on ebay and stumbled onto a EUROPEAN seed supplier who has loads of really interesting seeds for sale. Many of these are unusual edibles, interesting ornamentals, n-fixing etc...
They have around 1000 different varieties listed.
My shopping basket currently has 14 different types of seed in it, including some large packets or ground cover species, and will arrive delivered for £30.
I've picked some experimentals as well as some to complement my polyculture ground covers.
Japanese Raisin Tree - don't know much about this but it looks interesting and we have a gap for it in the garden
Antonovka Apple - seeds for growing some root stocks
I've sometimes seen interesting tree seeds on ebay, too; I'd be interested in finding out how yours work out.
I have also bought some cheap trees and shrubs off ebay, too. Currently I'm pampering some grapevine cuttings I bought off a guy from ebay. I sold a nice coat on ebay for a tidy sum recently and the money's currently hanging out in my paypal account--so I can spend it all on ebay for plants for my new food forest garden