1982 or 1987
 

Im a newbie in the market for an older 911. I can get an 82 or 87 911 targa for about same price but wondering which is more reliable? thank you in advance.

Definitly the 87 is more reliable. One is beginning of 930 series, which ended in 1989... For instance, 87 has G50 thansmission, better than 915...

I have 1989 Carrera cabrio...

it really depends on the condition of the car more than anything. Both are quite old and frankly once you get beyond 20 years back age is not important, only condition. Either has value pretty only because they are a classic car - its old and was significant in its time: neither will perform up to modern standards and so I generally go with the older car, if in equivalent condition.