Where I am at least, the 3% x2 commissions are just a customary commission share. Technically the listing agent charges whatever they want and shares whatever they want. Usually they charge 6% and share half. But there no obligation to offer buyers commission on the MLS listing. I put 0%. I felt like being on the MLS would sort this out, most shoppers would see the listing regardless and their agent can decide what to do at that point (I'd bet they'd show it if the buyer was interested)
