[bigshrimpin]

Neckbone,
MJ's right on . . . . just to add onto what MJ has already said.

Step on every inch of the floor and see if you can locate any soft spots (especially around pedestal seats / screw holes/ around rod holders).

Fuel tank?
I'm not sure about the 83 fisherman . . . I think they had an aluminum tank. Newer v20's had poly tanks - around 86 (I think). Anyway open up the bilge and try to detect any overpowering fuel odors or fuel at the bottom of the bilge.

Trailer sounds good - check condition of the axels, leaf spings (unless they're torsion axels) and tires.

you can replace the bearings and leaf springs later on. (can't be too picky for $3900)

On the engine -

Compression test - Ask a dealer what normal compression is for this engine. general rule is that the compression should be within 10% on all cylinders.

Lower Unit Gear oil - Water in the lower unit turns the gear oil into a milky color. If you are happy with everything else on the boat ask him if he'll let you change the gear oil.
When you drain the oil look for excessive metal filings or chips in addition to checking for the milky color.

Take it for a ride.

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- Expect to rewire the boat.
- lube or replace the steering and control cables.
- Drain plugs in the floor should be replace if they are original.
- replace fuel lines, bilge pump, lights, etc.
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Bottom paint will come off, but it's a lot easier to put on fresh bottom paint.