Question about realtor commissions

[Account Closed]

I know that if we sell with a conventional realtor the commission is between 4.5% (lowest we could find with Redfin) and 7% (first realtor we contacted) and that half goes to the sellers realtor and the other half to the buyers realtor. RedinNow instant offer charges between 7% and 9% (not sure if it gets divided). My question is what happens if we sell it straight to a cash real estate investor. Are there sellers or buyers commissions or do we save on that?