Well, I don't seem to learn. Found another S&W 79G on e-bay. Watched it several days and no body was doing anything. Advertised as not functioning and didn't operate. It didn't. Thought about it and wondered what could be wrong with it, but decided to take a chance.Received it and put in a CO2 cartridge, slight hiss and then it stopped. Bore had a pellet in it that I pushed out. Put a pellet in it and it went piff. Tried again and piff. Went to open it to remove the CO2 cartridge and the pressure was to high. Had to use padded pliers to open it under full CO2 pressure. What the heck, its holding pressure but won't shoot? Opened up the gun and found out someone had tried to reseal it and left out the transfer port, power adjust bar, spring bar the power adjust bar bears against. I could hear gun trying to fire, but no gas was getting to the barrel. Hammer stroke was too weak to open the valve far enough plus with no transfer port, gas not going into barrel.Found a transfer port I could buy without using vinyl tubing and also the power adjust bar. Could have made the power adjust bar on the lathe, but for $5.50, just bought it also. Had to make the other part which took about an hour. Went ahead and also bought another exhaust valve even though this one looks ok. Should be good to go when the parts get here. Don't need two S&W 79G pistols, but what the heck, I'll probably never sell it since this is one of those guns you just don't find very often.Now if I could just find the Sheridan EB20. But preferably one that is working. The ones I find are priced way too high for just a working gun. Maybe at the airgun show in August in Mansfield.