The Maidenhead ones are cheaper but smaller. I got mine from an independent shop before I discovered my local Maidenhead store, so I guess that was why they were more.
Oh well they are fit and healthy so I am not worried.
Charlie - Ceylon - in a 240 litre (63 Gallon) tank
Purley -
My lfs was selling Topaz puffers for £15 but man they were not in good condition.Fins frayed and jet black bellies. It has to be worth the £10 extra to get good healthy fish like you got jacknife.