I have an old Crosman .50 cal SpotMarker from back in the day; it's barely used and probably has less then 100 rds through it. It's been sitting in the safe for a couple of decades. I replaced all the seals except for this one because my parts guy didn't have one at the time I purchased all the seals:
Products (357-041 valve nut washer)
It doesn't seem to need this washer as it holds pressure very well over the course of several days. The marker has a new latch support so it latches up nice and tight. It comes with a total of 3 cylinders that all index perfectly. This marker is still very tight because it has been used very little. I'd like $200 plus actual USPS Priority Mail shipping (48 CONUS only) which will include delivery confirmation. Insurance is optional but highly recommended for I am not responsible for items lost or damaged in the mail. Payment can be by discreet PayPal or USPS Money Order. PM me with your zip code for a total. (SOLD)
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