Welcome to the BeachCats, good bunch of people here.
Remember, the ad says OBO. The owner probably wants it gone before winter.
It also says TLC, read needs a few hundred thrown at it. I would take 5 crisp new $100 bills,(with a couple in reserve) point out the deficiencies,& see what falls out.
Barring any major issue, there is no reason you cannot sail this boat for years, with reasonable cost.
Chances are good you can pick it up very cheap. Bring a set of good wheels & maybe a portable set of trailer lights.
Rig the boat in your yard, change essentials like standing rigging, & put it in the water, & then decide what really needs to be done.
My '84 5.7 (same build technology) is quite flexible in certain places along the sides. Trapped out, with my toes near the decks, & heels below the stripes it's pretty solid,(heel is on an internal stringer). However, if I push between those points, I can deflect.
Same goes for the inside of the hulls.When flipped, & standing on the inside of hull, it flexes quite a bit in certain spots. Just pushing with a hand will bend the walls. Keep pushing around the perceived "soft spot", especially towards deck & keel. If it stiffens,(as you hit the stringers) don't worry about it. Moving fore/aft, if you are pushing in an area between stringers, you will find fairly long areas that flex. Coming from other boats, I too worried about it at first. Five years later, (30-40 days/yr) & pounding it through some rough water, solo,double, or even triple crewed, it still flexes the same.
The decks on both my Nacras are fairly stiff, mostly because they are slightly convex. However they too will flex a bit if stepped on right in the middle, where there is little support,(See the photos in the Thread Nacra 5.2 Hull Damage).
If you are working solo pressure test the hulls using a $1 rig like this, & a bucket of soapy water & a mop. If no big leaks, sail it!
I personally would not get into deck removal unless you find one of the sot spots is due to glass that is really damaged.
http://www.thebeachcats.c…ictures?g2_itemId=118697
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Hobie 18 Magnum
Dart 15
Mystere 6.0XL Sold Was a handful solo
Nacra 5.7
Nacra 5.0
Bombardier Invitation (Now officially DEAD)
Various other Dock cluttering WaterCrap
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