I have the exact same boat, mine is a 27SS I never heard or seen a 24SS. Could be a error in the listing. Mine is actually 26'4".
It's a great and solid boat. Mine rides very well for a 27 foot boat. They give a solid ride and do not shake and rattle like a lot of boat do.
I boat on lake erie and had mine out in 6ft seas. I always felt safe in that boat. Mine has a TRS drive.
The pictures of that boat look identical to mine. I do agree with the listing, you will not find a better built boat cheaper.
It is an 84 make sure to take a good look at the stringers and transome. I would be intrested in seeing some more picture if you get any.