You've made it pretty clear you're flipping to buying groups. You don't think that's a little shady? You're basically preying on the ignorance of those who will sell to you not knowing about the buying groups.
I hope you're joking.
IMO, he's providing an opportunity to those that don't know about buying groups/don't want to deal with buying groups.
What do you think the buying groups do with it?
They sell to a wholesaler who sells to a retailer (usually with one or 2 more people in the middle).
Are they taking advantage of you/"preying on you", since you don't know how to reach wholesalers and retailers?