Hey there Puddincorvette! Best advice is to carefully check for what modifications have been done to the vehicle. I prefer to find a car that no one has messed with...camshafts, heads, high stall converters, headers, the stuff that enhances horsepower and performance...which equals abuse. Burnouts, powershifting, hard launches off the line type racing are all quite fun, but lead to heavy loads on all components, high wear on just about everything. A stock, well taken care of vehicle with reasonable mileage is usually a safe bet, those type of owners take pride in their Vette, and this leads to a high value vehicle. Paying a couple of bucks more for a great car is long term insurance for a good return on your investment...should you sell it off down the road. I personally have owned three (85,85,93) Vettes....and have almost doubled my money of two of them. Not bad! Doug Nash four speeds with overdrive have mixed reviews, read up on those problems. Six speed ZF transmission(my 93 had one) was absolutely remarkable, smooth as silk, slick shifts, remarkable performance. Available in the later models of the C4 series. Higher mileage cars will require more replacement of parts,but RockAuto has a reasonable supply. There are also parts specialists in the US, but always weigh the cost with the exchange rate, customs charges, shipping, etc., against the price of Canadian suppliers. Also be parts-smart! I fixed the automatic climate control system on my '86 for only $15 from Kenny Auto Parts, while the new part (the motor control relay)was over $200. I researched the part, and discovered the Cadillac Sevilles of the same year range used the same system. Located the car in the yard in Laval Quebec, and it was the identical part...right down to the part number. Good Luck!