Depends on how you define 'worth buying as a project'
To many its just an old glass boat and you'd be hard pressed to get your material cost back, and have provided all your own free labor, no matter how accurate and exceptional a restore you do.
Trailer? Towable?
Motor? Running?
Actual condition of fiberglass and gelcoat?
Might get lucky and find a buyer whose family had 1 growing up, and they HAVE to have it. Still depends on what you've spent and they're willing to pay.
How about some pix?
I've seen quite a few Skagits, no Guy Lomdardos that I know of. But that alone doesnt make it valuable.
Unfortunately, vintage boats arent like vntage cars.
Also depends on what market you're in. Here in WV, I suspect most wouldn't pay the $200 w a trailer and non-running motor.
The internet does make the market larger, but you'd still have to find that 1 in a 100000 (or more) buyer.