I appreciate seeing a perspective from the "other side" on this. Still, as a small business operator occasionally making B2B purchases, I still find "call for pricing" annoying and assume it will mean that the product is way out of my price range.

Could there be some middle ground? Could you do something like "prices start at $X; additional fees may apply?" At least give us a ballpark number; something from which I can decide if it's worth my time to investigate further.