how much should i pay???
 

this guy has an autometer, phantom series, fuel pressure gauge he is selling with everything to hook it up. he said he paid like $250 for it, and he'd take $190 for it, but i see them on jegs.com and summitracing.com for $189 new; so this guy's probably trying to screw me over.

so i'm not sure what i should pay for a used one, could someone help?

If its a standard gauge and he's selling you the Isolator...

Forget it....

Just buy an electric fuel pressure gauge and be done with it....

that Isolator BS is for the birds....

sorry, it is the electric fuel pressure gauge, its not mechanical