There is a plethora of factors to consider, it isn't simply a matter of buying a few blank bats, getting stickers printed and off you go. Remember the financial aspects:
Are you going to have a website, if so, how much a year will this and a domain cost?
Remember, bats will break and its not always your fault, how will you deal with replacements/refunds?
Importing bats comes with the added threat of bats being drilled by customs, how are you going to factor in a contingency?
all of these things need to be considered before you can set a price mark up, in order to run your brand properly, you will probably find yourself pricing your bats more or less at the same price your competitors are, simply because they have the same matters to consider. Therefore, why should Mr A pick your bats over anyone elses?
further, if you try to cut supplier costs to save a little, are you going to be bringing sub-standard goods to market like so many small brands do? this is one of the main reasons why Mr A will pay a little extra to feel the security of someone like Kookaburra being financially able to replace, refund and guarantee quality etc.