I have had good luck selling on web forums like this one.
However, I have had better luck with the local non-gun specific classified sections for lesser priced guns.
One thing about THR and others like it is that they are filled with people who know guns and keep up with trends, prices, issues, etc. That is seldom the case of the folks on community garage sale type websites and they tend to be less knowledgeable as to current market conditions. Not saying you can, or should, go there and cheat a buyer, just saying you might be able to realize a better sale price in that type of environment, especially right now.
I like those Makarovs, and if you were close I would meet you at a local sporting goods store and cover the costs for a reasonably priced (basic 10/22 and below) .22lr rifle in exchange for that pistol (as long as you filled out the 4473 to keep it legal, LOL).