Realistically, on an average, 3-bedroom, standalone residential sale the time, paperwork, advertising, AND legal liability that a broker assumes (along with the overhead of having an office & staff) makes 6% come out about right. About half (maybe more) of your transactions are going to go bad and the realtor gets nothing in most of those cases and has to eat sunk costs.
The alternative that I like the best was called, IIRC, ala carte or unbundled pricing. In that model, the realtor developed an itemized price list for services; Photos $50, Negotiating contract $300, Closing paperwork $200, yada yada yada. The seller (or buyer, if acting as a Buyers Agent) would pay those no matter if the property sold or not. It was more than fair, but **NOBODY** - Seller OR Buyer - would opt for it having been spoiled by the commission-only-if-sold model.
>land
For residential lots, we charge 8%-10% because they are typically on the market a very long time and require tons of advertising, lots of contact with 'lookers', and -IMO- an agent that has lot sale experience to get it to close.
Farms and large tracts are usually marketed by specialists.