Approx idea of how much felled Ash tree is worth ?

[cessna]

I have been offered a felled straight Ash trunk (Approx12Mtrs long by approx 600m diameter) ,cleared of branches lying on flat ground in a paddock with easy access for forwarding trailer , how much should I pay for it,or would it be worth more to someone for planking.  Asking as not bought any wood for a year, since then a lot of Ash around due to Ash die back,trees being felled and on the market.   

Situated in the Cotswolds.  

[Rough Hewn]

About £40-£60.
As is.