I use a 9 a.m to 9 p.m when calling private sellers. When in car retail, found could find good deals privately and pretend to be a private buyer!
I also set my price near high retail--find most people especially private sellers do this but don't do it consciously. You get more serious lookers when higher priced. Key word lookers.
Last post was right lots of toys being sold. Second its tougher for people to get bank loans for toys. Seller could have tons of interest but no buyers--needs money and is ready too blow it out. $6,500 would be a fair starting point. Would not go over $7,000 myself and $6,500 should bring you near that.