I've been using Kenibreed plants recently. You have to email them for a seed price list and they only sell seeds by the thousand, but the prices are very good. You will have to pay for a phyto and postage, but very good value. They are in India so seeds direct from the source and always fresh.
Kenibreed Plants - We deal in seeds of ornamental / flowering plant and some bulbous plants
Ignore the seed range on the website, you need to email them for their full range.
Also Europalms are very good
Europalms - Home
These are the only seed suppliers I use now, no one else compares in my opinion.