um,
you should be looking for condition, not necessarily an 'sc'..even the newest sc is 23 years old. the mid-year car, properly sorted, is arguably the best bang for your buck..just don't jump on the first car that comes along no matter what model. you can find trashed-out sc's, middies, even carreras if their owners didn't take care of them. so you want a 911..buy condition..and be open to whatever you find whether it be an early, mid-year or yes..even an sc.
like pbh just said..you'll find a complete spectrum of condition for this vintage of car. i paid $6500 for mine 5 years ago, but i stole it..the deals are out there..today i wouldn't take twice what i paid for it. good luck!
ryan