What does a Real estate agent charge for selling land only?

It's open to negotiation. However, two points are worth bearing in mind. On the one hand, the price may be much lower than the average house asking price -- which will limit an agent's interest in spending money on promoting it. On the other hand, it usually takes much longer to sell raw land than houses -- which can further reduce an agent's incentive to advertise the property. The main exception is with land that can be developed, which is likely to mean a price in the hundreds of thousands (or even millions). While this limits the number of potential buyers, it can also attract an agent with all the "right connections."