Okay Marc, totally confused now, in your first post you said you'd 'bought' a Seeley Weslake, now you're saying you found one in your Dad's shed. You don't actually seem interested in the info provided, just a valuation. I doubt anyone on here can help, this is a forum for cafe racer enthusiasts, not auctioneers, try Classic Bike magazine, there's loads of dealers who can offer you money for your 'dad's' bike!