Dawg1.....is your Z retrofitted for R134A or is it still R12...if its R12 it isn't worth it man...R12 is insanely cold don't get me wrong but it is so expensive and getting rare to find! if it was previously retrofitted for R134A then id say its worth fixing bc that stuff is a lot cheaper!....and the best way to get it recharged is to just pay a shop to do it...i know at the shop i work at we only charge 95.99 for a full EVAC/Vacuum/Recharge on the system and we also insert the dye to track the leak......but on my personal Z i ripped the A/C out... i live in Indiana so it don't get to hot here....and since you don't drive much at all i wouldn't mess with the A/C man