Looking for a 85" to 88" 911 Carrera

I just began my search for an 85" to 88" 911 Carrera. I am new to 911's. but always liked them, and drove a few that some of my friends had.

Few things i am looking for:

1.) I am looking for advice on what to look out for when purchasing a 911 between these years
2.) What a fair price would be for a coupe with under 80K miles.
3.) Do the 911's in these model years have distinctive mechanical problems that have been widely reported or specific things i should know abot these model years?
4.) Any good sources of where i might be able to find them besides ebay and autotrader?

Your help is appreciated.

Thanks.

Check out the thread on best Porsche sites for great info on that topic.
Good luck/skill!