if your selling via a forum, you have already failed.
use proper domain auction sites, or you will probably end up getting a low bid from bitcoiners who wont want to hand over too much bitcoin because they know in a years time bitcoin will be worth alot more. bitcoin is not stable enough for high value items and people are reluctant to hand off large amounts.
so sell your domain for fiat then use those funds to buy bitcoin. then you will get a nice proper fiat value bid. and the bitcoins you buy will be worth alot more in a year
I have to agree with the above statement. If you should choose to go to auction, this forum would be your best bet. Any auction site is going to give you a low bid amount. You can try to sell it on eBay if you wanted, that will give you the most exposure, but you will probably have to accept PAYPAL as payment unless you advertise that you will accept BTC and hope that eBay will not take down the auction.