Collector's value is in the eye of the beholder. I would take an OD Glock over a plain jane black one any day of the week. Building a collection of them at this time.
God forbid that I would ever need to replace my OD Glock 23, but years from now if I had to and you had a spotless one I would pay an above average price to get it.
I'd love to know what price you were getting for it.