I'd never get SH from someplace that doesn't even have the basic species info correct.
Additionally, based on his prices, I suspect that he's getting his SH from either Sri Lanka or SE Asia where they raise the SH in net pens or vats with NSW pumped in, so they're really just glorified WC specimens that require a full prophylactic treatment for parasites.
I can tell you that these "cheap" SH often cost a lot more in time and money than true CB specimens by the time you "pre-treat" them, wean them to frozen, and possibly deal with their typically poor health.