national multi list Selling Motorhome on line for a price of $399.00 to list nationwide

I got a phone call from a woman that stated a company called National Multi Listings could sell my motorhome on-line faster than I could sell it myself. She said that they have contacts that are looking for these type of vehicles. She said a person would call me back in a short time and go over every thing. After 30 to 60 minutes a person from the listing called and explained what they will do. For a sum of $399.00 to list and put pictures of motorhome, I would have calls with in 2 t0 3 weeks. It has been about two months and I haven't received one call or e-mail yet as of 6/10/2014. When I call Scott at 720-242-6842, he is always out of the office and can't talk now. He always says to call him back in 1 1/2 hours and when I do, NO ANSWER.