there are a ton of issues,
for a quick coverage of a few.
first I could say " hey everyone I have CB purple people eaters available now" and people could contact me, and I could make a sale, but its against the rules, so some one says bend or change the rules what about the nice people at ORA or ..... they are just breeders also, do they get a say ??? where is the line drawn?? number of tanks or number of employees how do we keep check on who has what? then you get to another issue I dont wanna sell 1 or 2 clowns, its not worth my time, its a royal pain to do things like work out shipping, your supposed to do things(setup accounts jump thru loops ...) if you ship livestock thru places like fedex and such, then I have to deal with taxes and such I have to collect sales tax, I have to keep a reciept, and come tax time i have to count the reciepts add things up and send the state $$$$$$$$ while i still have to do the work my <50 reciepts a year are easy now im gona have what 100 or 200 or ?? then I have to deal with dead fish do I refund do i make them return a dead one to me, or just all sales final. no thanks. so the next maybe would be to list the places I sell to, so people could contact them, well ok but now my private sale isnt so private, and I am being an ?agent?(grab the legal term yourself if you want it) for the LFS, now say i jump on RC and someone has just installed a 5000gph wet dry on his 20gal reef, and i do something stupid like say tell him to "get a clue" and he sees this link he can now go after the LFS, maybe not win anything, but now the LFS is involved and so am I again. and now we know that the rules wont be bent for the LFS, so I cant post the "purple people eaters available at supersmelly fish store at 1245 idonno, state of confusion" label. and what does a company like ORA do there, list 10,000,000 fish stores

and I know that IF i advertised the sale of a species of fish that Id sell all i have in a day. the LFS's would not be so happy then, and we have just killed any chance I had with working with an online vendor.
and I am just breeding out of my garage(*anywhere* else in the house a tank fits) trying to make a buck and have fun with fish.
hopefully I made some sence in that, and you understand that for every good thought are 50 reasons it might not work and some of those are less important, but others are very important. if someone spends the time it could be good to have. but this is part of the "time" some how this needs to be put together so no one is so upset(?) by what is done that it falls apart.