Welcome to A4A! ;D
I will be getting my spuds from our local Growers Association, they are a bargain and apparently very good (first time for me too!)
Worth investigating if you have any in your area maybe?
ours is run by a couple of old boys, is only open for 2 hours on Saturday and Sunday, but they are a wealth of local info and sell everything we need for our allotment for ridiculously good prices (3kg of seed potatoes = £1.20 for example!)