Market is pretty dry, its extremely hard to find fish even common ones now a days.
Also if anyone had ever qted their own fish, you should know what pain you have to go through and if thing sgo wrong you only lose 2, 3 or 6 fish in 1 qt, Now times that pain 20 times.,
I have 4 tanks (50 gal) each plumbed to 1 sump making it 1 system. I have 10 systems like that. If bacterial infection spreads or som aersol disease spreads, I dont lose 5 or 6 fish, I lose entire lots,
I had to shut down many times, bleach and start over in last 5 years. This Nov i lost entire inventory to bacterial infection. December we didnt ship because fedex was messing up causing major losses (doa)
Regarding why I may send you just a fish or 2 sometimes is because if i dont these fish will die stuck in 8x8 section, I rather send them to their homes and by the way i dont charge shipping if i split the order, My first goal and passion is to provide the fish best for its survival.
I have said this may times over, I am not in this for money. I have 2 businesses and a full time gov level contrat job. I do this for the passion I have for the hobby.
Its very simple math, If you were to start with 5 or 6 fish and you are in the middle of qt and 1 fish or 2 die, You have to either buy them again and start your qt time all over again or dump them and finish what you have and redo another qt for the remaining fish. If you even do that once that puts you at 2 months before you have all your fish in main tank.
When hobbyist qt fish their chances of getting a disease in qt is 50% dealing with 5 or 6 or 10 fish, When i qt fish my chances of disease is 75%-90% as i am putting 60-80 fish in the same system.
Its a different ball game when it comes to qtying commercially this is why there is not a single commercial company doing it on such large scale, Ones that do are very limited to what they qt and how many they do.
Also I am very carefuly of my reputation when it comes to fish and their health so I take my time otherwise there will be a flood of neg reviews and comments about me in no time.