There are many of these for sale all the time, I even thought about selling my own but then read the terms and conditions and wrote this review instead!
These £10.00 gift vouchers are sent out with almost every DVD that the company sends it's members as part of it's online rental service, !!!THEY ARE WORTHLESS!!!
The vouchers entitle you to 1 months free rental from the website as long as you cancel your direct debit (which you need to set up to receve anything) before the trial ends, futher more the vouchers have an EXPIRY DATE.
The reason they are worthless is that you can get a free trial just by signing up to the website you do not need a voucher (all the vouchers i have received have had the same promotional code on anyway)
If however you want to invite someone to use the service as part of a gift then these are worth buying but not for anywhere near their value, the sellers with low prices and cheap or free P&P are the ones to look for.