Looking at the list, the boat is fairly well equipped. No mention of windless, or camper canvas--both can be desirable. The trailer is single axle--many are, and they are fine for relatively short distance trailering. I had a single axle trailer, on one of my boats, and it did fail, after several cross country trips. If you are only going a few hundred miles, or even limited long distance that should be fine. If you plan on cross country multiple times, a 2 axle trailer will be better. Be sure that the tire manufacture date is less than 5 years old. No matter what the tread looks like. The tires fail from "dry rot" far more often than being worn out. RV and boat trailer tries should be replaced every 5 to 6 years.
Full camper canvas is somewhere in the $2500 on up category, and gives you an "extra room". It is nice when there is rain. Also zip out windows with screens make sitting out when the bugs are out is a good idea.
Find out if the boat has been shrink wrapped or stored inside during the winter. You are in an area of freeze thaw cycles. This could cause issues. If the cockpit has been dry with the cockpit cover this may suffice.
The dry weight is right out of the brochure, and is slightly misleading. Basically figure the boats are 4500# on the trailer, some can be over 5,000# loaded for cruising, and a very light boat on the trailer is 4,000 #. This may make a difference in tow vehicle.
The removable cockpit floor is a very nice feature. I consider this a plus. It sounds as if a newer chart plotter and sounder which is good. A Bimini is good, the inside hand rails are good, I like the Wallas stove. The Bimini is good. A cockpit slant back cover (I believe this is what he is referring to.) is good.
You will have to make your or have a surveyor made the determination about other issues. You have had some good advice.
The boat has been for sale for some time. Location is probably why. If this boat was in the PNW, it probably would have sold fairly quickly. Price should always be a willing buyer and willing seller.
It sounds as if the boat may be close to your location--if so, go look at it, send some of us or post the photos you take.
Generally the process of sale is: see boat, make offer, agree on price, put a deposit of 10% (refundable) and arrange for Sea Trial and survey. Pay for the boat, and have a great big smile on your face when you trailer it home! It is very possible that in this case the agreement is a "hand shake", but I am aware of even some C Dory sales where someone came along and made a higher offer, where there was no written sales agreement.