Re: C & C Mark I Input
The C&C 25 Mark I is a great boat, I owned the big sister 30 version for a number of years long ago and still consider her the best boat I've owned. I would take this model over any other 25' without hesitation. this is a reasonably stiff boat, your heeling in 30 MPH wind depends on the sail area, you should have been using a 100% jib alone or double-reefed main if no such jib. This boat will handle better than most anything else you might come across in this size.
A keel boat like this is not likely to have a trailer, even if it did, you'd need a crane to launch it...
The price seems reasonable for the stated condition and gear.
Certified...in several regards...