I don't know if you can offer the whole line of Fiocchi primers (pistol/rifle small/large normal/magnum), but if it's possible to offer them for the same price as the SPP (about 50-51$ per 1500), then I think it would sell well.
Personnally, when I buy primers, I usually go for the lowest price, and unless they don't go bang, I don't think twice about the brand. I'm fairly certain that most reloaders are like me. Or at least most high-volume reloaders are like that (the BR shooters are willing to pay a lot more for their BR primers, but they buy them by the 100, not by the 1000s and 10ks).