Welcome, John.
Your post made me smile.
Advice: forget the CO2 stuff, and find a nice used Diana 6/6G/6M or 10 with good seals, or an FWB65/80, or a FAS600, or even a Gamo Compact (pre-2007 have better triggers). It will be much better to shoot, much better preparation for 10M match, and hold its used value.