rob, I have an 87 vette.  Now, it does have high highway miles, a   total of 167,000 to be exact, however it has a total engine and tranny rebuild at 134,000.  The exterior and interior looks brand spanking new.  New tires, brakes, alternator, etc...
Runs like a raped ape!  It does everything better than my two C3 vettes could ever do.  I paid $6250 for the car.  I figure that I would have to run the thing up a pole to ruin this investment!  In my area, clean 92-94's are selling for around 16,000 to 18,000.  In my area, Vettes are not driven from Nov-March due to bad weather.  So, they're usually pretty clean underneath as well.  I really like the improvements in the "94 style.  My next Vette will be likely a 97.  I love the new style.  I got to drive one.  Major cool!!  C5 beats the C4 in everything.   Prices of the 97 will come down in about 2 years.  I loved my 71 and 76 Vettes, but became spoiled with the advances of the C4.   They're not as pretty, but grow on your real fast.  I swear my 87 will outrun my 71 LT-1 in the 1/4 mi run!  I hope you get a good 94, I'd love to have one!