That rig is a c-120 (so-called 3/4 ton) and was available in several wheelbase lengths as you can see from the attached spec sheets which you can download and save. Same cab as the earlier b and a-line trucks but has a different front clip. That was a "transition" production model to preface the introduction of the next generation platform. Produced as a "1961" and a "1962" model only but could be titled as anything! If the serial number on the data plate has a "-1" suffix after the number, then it's a so-called '61, if it has a "-2" suffix, then it's a so-called '62.
If the engine is original, then the info on the data plate will id the motor by "horsepower", ya can compare that info with what ya see in this data sheet. Either a 266 or a 304, either engine is highly regarded in these rigs.
That has the optional "hydrovac" power brake system, the single master cylinder reservoir serves both the brake and clutch hydraulic masters in a combined unit.
Is it "worth" the asking price? That depends upon the rust condition that is visible from the exterior and from underneath. If it has "normal" factory-original rust, then I'd offer $500 as a starting point considering the engine has set for years and no telling what is going to be found. If the bed floor is not rotted through, the lower front fenders and rockers are solid, and the cab floor is solid, then it's certainly worth the asking price!