Well a new one can be bought for a few pounds over £700 and many dealers would do carriage for around £30 which gives them a nationwide pool of buyers.
If you sell yours collection only you will cut down buyers to more local folks.
I see on Ebay similar Honwave models are making around £500 used. If you could Ebay yours showing it as new with all paperwork then I'm going to take a guess you may get just over £550... £600 on a really good day possibly.
Of course a lack of buyers in your area could drag it down to £400 or so.
