If your Tesco has these then they will be sold off cheap at some point as they are end of range. Lots of computer stuff is going at 1/4 of Tesco's normal inflated prices. :P

Tesco Silverburn has the wireless 64gb stick at £12.50, the normal 64gb at £6.50, the 128gb are sold out afaik. They also have some keyboard at £90 normally going for £22.50.

edit: Just back from Tesco and the three I mentioned above are sold out; 64gb wireless sandisk connect sold out, 64gb usb3 stick sold out, the ipad kyeboard sold out.

£34 in Colchester highwoods

So it's a reduced item, that has been found only in a single store - unlikely to find elsewhere