I wondered why I hadn't spotted your sale on ebay, you would have been better putting it in the "Amiga 1200" category as I think thats where most A1200 users look when searching for stuff on ebay.
In the past couple of weeks the same boards have been sold in that section for just over the £300 mark with a fair number of bidders. If your board doesn't sell you might like to try re-listing it in the category I mentioned as they seem to do quite well in there...

(although I hope you do manage to sell it as it's an excellent board for the A1200...
