Commission based on home value is a joke. Realtors should earn a flat-rate.
I agree - especially for the last few years, when in order to sell a house all you had to do was put in on the market - and then get 10-15-20 offers at or above listing price - no agent deserves a 6% commission for simply getting something listed on zillow or MLS where in recent years, the houses just sold themselves.
Typically 3% is seller agent commission and 3% is buyer agent commission - although in the paperwork it's most likely 6% to the seller's agent and the seller's agent offers 3% to the buyer's agent.
Although 5% total / 2.5% to each realtor is becoming a bit more popular as of recent, based on the listing I browse.