Recommendation on Prices and Where to Sell

I have 3 bottles of single malt scotch that I wish to sell and would like to know the best price I could for them as well as where I could sell them.
The bottles are :

Macallan 30yr Sherry Cask in wooden blue box.
Macallan 18yr Gran Reserva in wooden box
Bowmore 30yr in the ceramic bottle with the Sea Dragon painted on it.

Any information would be appreciated.

Thanks.