Hum, looks like a KRA-21 from the 70's onward. As for price, to me, well not much, ~$60 max if it was in good working condition (not bent up and not bad rust spots). They are neat boxes and look like they would make a good throw in the trunk box. For that one probably more like $40, looks like it is in primer or something. Just my 2¢
EDIT. I found the ad, GO BUY THAT NOW, Actually I hope you already got it home. Deal of the year right there.
