Burgess tends to be fairly inexpensive especially keeping quality in mind in the UK
http://www.petsathome.com/shop/en/pe...2Burgess%2522#
With an online order there is potential for getting free or lower cost shipping,depending on where you order.Just keep in mind the same guidelines as I've posted previously with any treats,as well as making sure that anything to be shared with dogs or cats has no corn or wheat in any form
As for many resources saying it is okay to keep dwarf hamsters together,that's kind of inaccurate on their part.There has been more than enough experience on this forum alone not to mention many other places(in some parts of the world with hamster forums,even discussing the keeping of multiple dwarf hamsters is essentially banned due to how dangerous and potentially cruel it is).