It's a modern replica. Value depends on condition, but probably somewhere between $75 and $250.
it ain't worth a monkeys left ball
Without the serial number and a description, there is no way to ball park value.
You need to include the model number along with the serial number to get a accurate answer to your question.
Are you referring to a Paint Ball Gun built by tippmann?
Play Ball - serial - was created on 1925-07-19.
Dieter Marschall's book will get you in the ball park.
It's a 54 caliber round ball
The Black Ball, it's worth 7 points.
The pink ball
Some makers have sn tables on their web sites that will get you in the ball park of when a firearm was made or shipped.
The brown ball is the 4 ball and worth 4 points.
the serial number on this one is 325171 Just would like a ball parc value for a poor to average condition its un fired for 45 years and rusty