Something else to think about is shipping. There are several sites on the web now that you can simply click and have your fish sent to you. This could be a road to go down maybe??? There is a ship here in the uk that is to far for me to visit. But most product they sell can be found on his eBay shop. Of course the price is a little higher but the postage is usually free.
If you choose to post fish out think about your returns policy d.o.a etc. as there will be cost that you will incur if things go wrong. As people will most defiantly try it on!!!!!
Obviously a web page is a cost to think about.
To be honest if you have the room at home, you could make just as much money, breeding and selling your own fish. Either by posting out or having people come buy from you. This way you don't have the overheads.
I found a chap here in the uk that can get fish from aquabeek and Czech breeders for a couple of euros each. A fraction of the cost of lfs
. If I had the time it would be easy to buy a few hundred pounds of fish, just to sell locally or on eBay. This might be a good starting point as you have less to loose, can build up a rep, with low overheads. Once you get established you can then move to bigger shop.
I tend to only go to shops I know, and know are good. and stick to theses few. I've popped into new shop to see what's in offer but tend not to go back.
Also theses days with less money about its easy to buy fish from local breeders cheap, and a lot of fish clubs hold auctions were fish sell really cheap. I just went to one and two massive wild caught from jeff rapps ( not sure what they were) but were south American cichlids I think) breeding pair went for £10 the pair!!! Breeding pair of oscars about 10 inches each £6 the pair!!!
So I would say this is your biggest completion.