Cheaper at "Special Reserve" - and if you'd got the timing right, PC WORLD were knocking out 5.5 at £19.99 - one time in an advert voucher offer, later as a general one.
I DID, and upgraded - but I'm still waiting for a 6.0.x.x that I'd consider uninstalling a VERY stable 5.5.10.42 for - I'm beginning to wonder why I bothered!
PS. If you want to deal with Special Reserve, I'd suggest going to your nearest one, and looking at joining for a year (£7.50) - which gives you a discount, but only if you can also find one of the joining gifts that you want, and is probably worth the fee in itself!
Need an Office Suite? - If you're a Smartsuite junkie like me, Smartsuite Millenium is usually on as a joining gift, Or fancy boyz toyz - radio controlled desktop racer. There's usually a good selection of PC, Console or other items!