No luck means price is too high for the market. If you go to a middleman, there will be no difference aside from the fact that the middleman will take a chunk out of the profit.
Tell him to lower the price so it's realistic and he will sell.
Alternatively, trade it in. Personally I don't do that because usually I can get more with a private sale but on certain vehicles, trade-ins are not so bad, and at least it's an easy process.