Redfin agents are salaried and aren’t setup on a typical salesperson / broker commission split. Keep in mind if you approach the selling agent and ask if he or she will also be your agent as well (dual agency) it will be very hard for him or her to keep a fiduciary duty to you and the seller at the same time. The most important thing however is to get as far into the loan process as you can before placing an offer– it shows you are very serious to the seller by having your “DU approve/eligible” ready to show that if they accept your offer you won’t let them down.