An offered "1953 Chevy van", which is in reality a 1953 Chevy Dubl-Duty Forward Control Chassis truck that looks externally for the most part intact and in relatively good shape.
The camper interior looks like it just needs to be fully gutted so a person can start with a clean slate and build the truck out to fit their ideas. Just my opinion, but I think the pictures indicate this is likely the Model 3742 3/4 ton 125-1/4" wheel base version. From the ad details, it sounds like it's been "in the family" for a real long time and may have a good title to boot?
1953 Chevy "Dubl-Duti" camperNote: 2nd picture below if from a 1953 Chevrolet Dealers handout showing just one of the ways it would have been used back in the day.