Gibsea boats were a pretty popular production boat. The things to watch for are all the things any 1988 boat might have problems with. Fundamentally well built boats can be in great shape still but the stuff attached to the boat starts to age and usually requires some replacements
and can add a lot of refit
costs to the purchase price
. It becomes a cost issue for all the things you have to buy even if you do all the work. All the work can take a long time. All the gear
costs more than the boat.
The better way to shop for boats is by condition and less by brand name.
It will really boil down to how well the boat was maintained. Those are the factors to look for in any boat 20 years old. If you search you find the asking prices are all over the range it's a clue. Some of them are not as well maintained as others and some were better equipped. You probaly want to pick from nearer the top of the list rather than the very bottom. If only the bottom of the range fits your budget
I would say it's a problem. You might have to spend 30% more than the purchase price
after you buy it but expect to pay 20%.
pictures are a poor way to evaluate the boat. You need to walk in and about to see them to really figure out how good a shape they are in. You can sometimes find a distressed sale
and get a good price on a good boat but don't go by the ads alone.