Realistically... you have to look at it from a driving stand point. Its a killer driver. Bottom of the car is dirty, paint is not great, interior has its minor flaws and engine compartment has been fluffed. The best thing about this car is that there is no hesitation to drive it. With a convertible to boot, what is going to stop you? The other plus is the colors, 4spd and paperwork. A smogged up 300hp is no L-71 435hp beast, but its enough power to have fun. I would say leave it up as is, or maybe clean the engine compartment, maybe not. Drive it. When you're bored, sell it. You cannot go wrong with a mid-year Vette, especially a '67 convertible. I've seen frame off restored '67 300hp convertibles with Duntov awards for $150,000+. Drivers at low end are around $35,000. This car will sell all day long at $45-$50k+.
I hope I did not bore anyone...
good luck
-Dan