Just my opinion, but if all else were equal, I would prefer a model with longer beds.
The details matter, including the bed length.
I have a very similar Delta 39-170 6in jointer. I think this Craftsman came from the same design perhaps same factory. I purchased mine in the early 90's. Back then made in Taiwan, and similar design sold by Jet, Grizzly, etc.
Mine is 45 or 46in overall bed length. I prefer when the wood is supported by the infeed bed without rollers. I have used rollers for long stock. It just takes times to get the rollers set up and level.
A big unknown is the method of getting the beds parallel. My Delta and likely this Craftsman has "gibs" which are special screws which contact the tapered rails for the bed. On my Delta I have gibs for both infeed and outfeed tables.
I would ask the seller about whether both beds can be adjusted or just one.
The "2 1/2 HP max" is a bad marketing term. Likely a 3/4 - 1HP motor. Ask the seller for the amp on the motor nameplate. This will allow you to know the real HP.
I do not think you need a large motor. I forget what mine is, but I think it is less than 1 HP. I have not found this to be a problem.
The specs say "1/8in" max cut. I do not change my jointer, I leave it at about 1/64in cut.
This one has superficial rust. Should be easy to remove, but not easy to tell if this is a sign of abuse, or just not taking care of the cast surfaces. Moisture in the air will cause the surfaces to rust if not waxed or some other protection applied.
I forget what I paid for my Delta. Likely < $400. I think this Craftsman may be worth $ 150 - 200.
I hate when people feel something is worth more than the market. They get insulted at realistic offers.
The one is listed on EBay starting at $175. Looks to be a very similar design. May be the same design.