I have used this Ebay site a few times and the service is great. Not to mention the seed amounts and the price.
I.E Marketmore Cucumber 200+ seeds = £1.49 + £0.75
In comparison the same Marketmore Cucumber seeds from Suttons you get 20 seeds for £1.75.
They also do a variety of poultry and bee keeping items and the postage is reasonable too.
Lauren :)