As for old guns and not having too much value. Unless you have truly a classic they are not worth much.
I.e. If you had a 1993 Chevy Beretta do you think people are going to give you 30% of its original value? Doubt it. Now if you have a 1969 Shellby Mustang that is worth at least 150% original value no matter the condition.
Collector items = high value.
Same with paintball guns. DC2's to this day are still expensive.