That's a sweet old Cap Gun. They were expensive when new, and were the Cadillac of toy guns. Depending on your definition of reasonable, I'd go for it. It is a cool conversation piece if nothing else. Here is a link for some more information on them: http://www.nicholscapguns.com/45pasadena.htm

And a site that has a couple for sale to give you an idea: http://www.freebirdcollectibles.com/rare.html