No idea on value but Brian has worked with Pat for years, I'm 100% sure it is a quality cue. A brand new Pat signed "sneaky pete" 4 pointer with 1 kielwood shaft was about $1300-1400 a year ago. It's not exactly sneaky as the wood is stunning. The sneakys don't have ring work.
I'm guessing ballpark if you were to buy it new with two shafts it would be $1500+ but I don't know a more exact range.