Oh yes I totally agree, trouble is it would not surprise me if they ring up their suppliers and just say that the fish arrived dead and then get credit on it............ they must be getting rein-burst some how as I can't imagine them just throwing dead fish and therefore money down the drain

If I had a pet shop I would use barrack tanks fully heated and filtered and cleaned regularly and educate people about proper betta care. The only small betta tanks I would sell would be labelled quarantine tanks and it be clearly stated that they were not long term homes for bettas. I would also hand out pamphlets on facts and myths of betta care explaining everything in full so that there is no room for misconception.