Feel Unique offer a pick n mix service, which consists of choose 5 samples for £3.95 which is basically a delivery fee, and you can test products before buying them.
Feel Unique then email you a code for £3.95 to use on the site against the products.

I don't usually like any of the samples, but saw the Clarins new range in there an wanted to try those before i bought full size! Not bad set of samples for less than 4 quid really.

If you're quick on the day the pick n mix goes live, there's high end stuff you can get sometimes!
Great service to offer, well done Feel Unique!