Im not sure how deep your in as far as refrigerant stuff goes but the jb digital goes for close to $800 just for the gauge, but it does 30 different types of refrigerants has psi, temp, hg, and a whole lot of other stuff. its new and ill sell it for $400 It might be to much gauge if you were just asking for 134a, but as you can see I have a snap on 134a manifold set with hoses, used about 5 times on my truck. these go for $450-$500 new, ill sell it for $200 it has ny name laser etched not mechanical so its not deep, but ill leave it cause its not worth ruining the red. also have a digital micron gauge new. goes for $180, and if you want it ill do $90. Im not sure if this was what you were looking for, or if you wanted something to get you buy, but here it is as requested. Thanks!
Jensen