Red Crown Gasoline - Salesman's Box?

Saw this at a swap meet yesterday. I have never seen anything like this, and I can't find anything similar online. The seller told me it was used on the back of a truck and there are two shelves in it to carry greases and oils. It was shown by salesmen to potential clients. He estimated it was from the 20's. The wood was in great shape, the patina is wonderful. It has not been restored. Don't know if you can tell but it even has pinstriping on the front panel. He was asking $1,500 - I really didn't know if that was a fair price or not.