Butterfly has price control policy,so you would get butterfly products at similar price anywhere. If you would like to get commercial h3, and through the authorised seller, then you may try online site, tabletennis11.
Table tennis 11 is best in my opinion because it has specials where you buy a certain amount and you get a discount for it. If you're finding a butterfly product for cheap then it's fake. Retailers aren't allowed to sell butterfly products cheaper or else butterfly drops them.