I remember watching one of Cory's 800 gallon YouTube videos about him adding 12" wild caught clown loaches to his 800 gallon tank.
I have to watch it again but if I remember correctly, he said he paid $200 for each, minimum order of two. That's almost certainly his wholesale price. I remember thinking how that's seemed like a great deal. I drove around to most of the Chicago area stores and besides the tiny ones, I only saw five bigger loaches for sale (that's after visiting 8-9 LFS). One place has a 3-4" one someone turned in for store credit and they want $40 for it. Other place had four 4" ones for $47.99 each.
I did talk to an owner at a store that I will probably buy most of my fish from whose store I really like. He said something about it being the end if loach season (this was like a month ago).
BTW, the baby loach prices are high here. The guy I like has healthy fish and good prices and he is selling his smaller ones $10 each or 3 for $25.
Another store that seems to take good care of their tanks but has higher prices wants $14 for Clowns even smaller. This other place I don't think has good tanks wants $12 for the tiniest loaches that had a dead one in the tank. Five days later, I went back and like 60% were gone. I think most died as I doubt they sold that many.