I remember buying this from Oddbins, however a quick google reveals this....http://www.thewhiskyexchange.com/P-7717.aspx
I admit to being baffled at the size of this *ransom demand* for a 13 year old, not even an OB, but it suggests a higher value might be possible.
You wouldn't get this at auction, but I would advise contacting McTears if interested in selling, they would probably break it down into 2 or 3 bottle batches and possibly spread over multiple auctions to realise the highest value.
I seem to recall a batch of Murdoch PE's being sold in this way a couple of years ago and realising high prices although there are other older and higher strength Murdoch bottlings around as well.
Good luck, whatever you do!