| I'd say you both have a good deal...
I thought the second hand price for a good condition 748 Bip '00 would be about £5800. (well that's what I've been seeing anyway)
Mind you depends on what the service history is like, the mods etc.
I'd say with no service history for the past two years you are looking at shelling out some dosh for worn parts on your service. I 'spose that depends on what mileage it has done in the last two years. | 
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