Exotic and tropical seeds are unique so the folks over on the Tropical forum might know the sources best. And many of the different exotics have their own forum too so check them out by plant name you are interested in. Oh and check out the Garden Baazar here too as many of the seed vendors have links and info posted there.

Few of the more common seed vendors that often get discussed here and on the Rate & Review Vendors forum (check it out for ones to avoid) carry unusual seeds because of the low demand but one I have dealt with is http://www.rarexoticseeds.com

Another is http://www.seedman.com/

I have had no problems with either of them in the past.

It just all depends on what specific seeds you are looking for as some seed vendors are highly specialized. ;)

Dave

Not to seem flippant, but you might as well ask "What is a good meal to fix for dinner."

Google is great. Type in the plant you want to grow, along with "seed" and check out the links.

To wit: I wanted some banana plants. Most places wanted $15-20 per plant, plus close to the same in shipping. I found a place that sold them for less than $10 and shipping was $7.

If you find a site, then you can always ask how people have fared buying from them.

YMMV,

Mike