Thing is, the high street shops are closing left right and centre. Take away the fact that it's BHA and in commercial terms you have a one off specialist shop with no chain to support failing branches. In terms of a high street shop it is never going to compete with internet sales and match day...
I know it's not the same but the charity sports shop on George Street sells both new and second hand merchandise. Not the range the shop has but still a fair amount of stock.