I do not believe that you have to worry about the commission as it is what it is. That is between your Buyer's Agent and Redfin as they have that all in writing.
So no matter what the commission is, it is based off of the selling price but since it is a short sale, there may be a variance in the amount of commission due to adjustments that the investor/lender may require but that, again is not your worry.
If the agent is the listing agent, they will not receive the full commission from the banks for working both sides of the deal.
My biggest concern is what your Realtor is going to be paid for his/her time and expenses at it takes a lot to time to get these files approved. At the end of the day, I have heard agents receiving only $250 after a deal was done and that doesn't pay anything but the gas bill.
Respect your Realtor and talk to your Realtor. I have concerns when you are reaching out on the internet and not discussing this directly.
Buying real estate is a long term commitment (usually) and the a Good Realtor has alot of experience and time invested and it just isn't about selling homes. It's taking classes, continuing education, webinars, more classes, etc. I, myself, take roughly 4 hours a week in education (either webinars or classes). That's a lot of time but in order to keep up with things, we need to do this. Respect your Realtor and they will guide you.
Bottom is, the relationship is between the Realtor and Redfin when it comes to money.
Barb Van Stensel
Keller Williams Lincoln Square
2156 W. Montrose
Chicago, IL 60618