At $30K you have about the same into it as a 5 year old Corvette. The challenge becomes how to find a way to recoup a portion of what you have into it. Even if you ask $15K the appeal of a modified car such as this is to a very small select audience. I suggest putting it on eBay, setting a reserve and see what the interest level is.
------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "