Vodaphone Anytime 1000 Sim Deal

Hi

Not sure if anyone is interested but I have seen the Vodaphone Anytime 200 sim deal with buy one get one free offered at £19.99 and also the Vodaphone Anytime 1000 sim deal with buy one get one free at £29.99.

The 2nd sim with the anytime 1000 offer has to be the Anytime 200 sim. As some of you are aware this is the deal where you buy at the above prices and you get the 12 months line rental for free with the cashback and if you revert to the lowest tarrif after 6 months.

The shop I went to in a little town called Dewsbury gives you two post-dated cheques which you can cash in after 3 months. I am quite tempted to go for this, just a bit worried in case the shop goes bust and my cheque isn't honoured. Does anyone know of any sites you can purchase the anytime1000 sim for a similar price online?

Cheers,

G