Re: 92 Bayler Decent Boat ?
The only "red flag" I got from reading the ad is that the upholstery has cracks "here and there". That is a sign that the boat has sat outside uncovered. Not a good situation. Also check for rotten transom, should be easy in that boat. Just look under the splashwell and probe the transom with an ice pic or awl to check for soft spots, especially near the bottom. Also, becasue the motor is off, you can probe the motor mounting bolt holes to see if water was leaking in around them (very common on outboard boats). And those controls probably will not work with your merc.
I think its over priced, if it checks out good, offer $600 and try to get it for $800.
BTW, bring a floor jack and jack up each trailer wheel, spin it and listen for a low rumble. Thats the sign of worn/rusty bearings. Figure about $30 a wheel for bearings and seals. And check the tires for cracks and dry rot. At this age, they could use replacing. Trailer tires rarely wear out, they "age" out. Can't tell from the pics, but if it has a white nylon rope on the winch, it should be replaced for a strap winch.