If I’m not mistaken – sellers costs are realtor (n/a in the case you described) and some title/escrow costs. It’s not a lot of $ once you get rid of the realtor commission.
I bought our house from my father – no realtor, but we used a title company to do the escrow. His costs were less than $1000. I don’t remember the exact amount – but it may have been just a few hundred dollars.
