I didn't know ' thou shalt not spend large amounts of money on tacky footwear ' was mentioned anywhere in the old testament.
Perhaps you should console yourself with the thought that you are improving Nike / Adidas / Umbro ( delete as appropriate ) end of year profits, indirectly supporting the exploitation of cheap labour ( although at that price they must be getting pretty good wages, but nothing like what a British employee would expect of course ), and looking like a pikey to boot !