1960 Laphroaig 40 year old Malt

[Wharfedale]

I have been given the chance to buy this from a friend. What should I be looking to offer?

[Bookie]

The most recent bottle of the Laphroaig 1960 40 year old sold at auction which I know of sold for £5000, around 1 year earlier I believe it was selling for around £4000 at auction.

https://www.scotchwhiskyauctions.com/auctions/104_the-66th-auction/116743_laphroaig-1960-vintage-reserve-oddbins-exclusive--original-advert/

There would have been auction fees and taxes for the seller to pay on this which wont exist in a private sale.