After calling almost every shop in town, i found one who does r12 and they gave me the following qoute, so I decided I will try the pressure test with these folks and then based on what they say go from there.

Pressure test : $24.95
Charge : $39.95
R12 per pound : $35

They say I may need up to 2 pounds.

This is more in the ball park of what I was looking to pay, however I just hope there is not a large cost involved if they find a leak.