This isn't just affecting tackle shops it's affecting everything and all markets it's also why branded names won't supply their products to just anyone. From what I remember, if you want to order from someone like Daiwa, they're looking for a first order in the region of £9K or thereabouts just as Levi's won't supply to supermarkets if they can avoid it.
There was a guy on here a while ago selling top quality flies for funny money which is all fine and well until the tax man catches up with you - and he will, then how will you be able to pay your advertising, mobile phone bill, tax, national insurance etc,. etc,.
What happens then, the guy packs it in because he's not making enough money to run even a cottage industry and some other joker takes his place. Eventually there are so many unreliable traders about that the dodgy dealers get in on the act. You post's 'yer money, you don't get your goods.
There's nothing wrong with looking for a bargain but it pays to trade with and support reputable, established traders before they decide it's just not worth it any more and shut up shop just like Cafaro's ( one of the oldest fishing shops in Glasgow ) intended to do last year.