Looks to me to be a 1963 Bambi
It's definitely between '58 & '63 based on the number of end cap panels. The only thing that is throwing me off a little is the front window - by '63 they were a single window whereas this one is split into three panels like the earlier 50's models. But with the added A/C it could have been modified - it's definitely not original with that A/C unit there.
Do you have more pictures (especially of the back) or a a VIN # from the plate by the door? It's tough from just that one side, but based on the configuration of the streetside access panels - it still think it's a '63 Bambi like these:
As far as price, if it is a '63 Bambi in the shape you describe, it would be in the $1900-3800 range based on this Price vs Condition
criteria. There's lots of great information there - take some time to read it so you have your homework done prior to trying to negotiate a deal. Good luck!