Is this a good buy?

Hi, I am a former V-20 owner and after a 5 year gap I have decided to buy another so I can go fishing again. The boat I want is a 1978 V-20; With a 1999 Merc 135 optimax OB.
It has a recent full canvas and bow rail. Comes with basic electronics. Entire soft deck was professionally replaced 2 years ago but still has original fuel tank.(why anyone would pay for that and not replace the tank seems strange) the deck now has only 2 small plastic hatches, 1 over the tank fuel fittings, one over the tank for the oil injection. I do not smell any gas in there but I can't imagine that original tank can last much longer.?.
The transom has been profess. replaced/glassed where the engine mounts also. Comes with a 2001 single axle trailer.
The interior is just fine but needs minor cosmetics.
I will pay for a compress. test and go for trial before buying. Is 10,000. a fair price? I look forward to getting another V-20 and am thrilled with the photo gallery!
Thanks for any feedback!