No, for the simple reason that if you're running a store that's using drop shipping, you're presumingly buying from a real wholesaler who offers drop ship service. But if you offer to sell to another merchant, then that merchant isn't buying from a true wholesaler. They're buying from you and you're now a middle man for that merchant.
So, there would need to be clear communication that if you're re-dropselling that you are not in fact a true wholesaler, so you're gross margin will be lower.