I do not know. You could ask an attorney. Know that even if you are selling without professional representation you need to comply with all federal, state, and local laws and disclosures.
You should also know that buyers file 70% of lawsuits in real estate transactions.
It could cost alot more than you think if you are not properly respresented! Having said that, you have escrow fees, title fees, recording fees, loan pay off fees etc. Call a local escrow company and get an estimate. But be careful about the terms of the purchase. Good Luck. Cindy Vedder