I have a medium sized tank and it's about $50 to fill up. That's at general air off sante fe and prince? So I'd bet yours is about $30 bucks or so.
1997 Honda civic DX( all stock DD)
1972 Toyota FJ40(4" lift, FJ60 axles, FJ60 4speed with split case, 35's, Detroit locker rear, Lockright front, Marlin Highsteer, 105"WB, Saginaw with GM tilt column, soon to have: 30spline longfields, inners/outters, toybox.
1967 Porsche 912(100% stock)