This next car is either a really expensive project that needs thousands of dollars of work to get it on the road...or a really good deal on a jet engine sitting on a "vehicle" chassis. Not sure which yet...but I'd take it for a test drive. Find this 1970s Jet Dragster Allison J35 here on eBay offered for $10,000 buy-it-now. 
Earlier this year I had the good fortune to visit the land down under for a business trip and I can tell you it was a magical place. The scenery was otherworldly and the cars were also from another dimension...but this next car is not just another fast saloon car, its a bloody ripper. If you don't want a car that requires a checklist to get going in the morning or could give you third degree burns if you turn left quickly...you probably should look elsewhere. Find this 1991ish Holden Commodore Jet Car here on ebay
currently bidding for $10,000 AUD ($7,853 USD) located in Enfield, South Australia with 1 day to go. Tip from Lars W.
The third generation Mitsubishi Eclipse was a huge disappointment for speed junkies and Mitsubishi performance enthusiasts when it was released for the 2000 model year. Gone was the peppy turbocharged 4-banger and road-hugging all-wheel-drive, in its place was a ponderous sloppy suspension and V6 power mated to the bloated Chrysler Sebring (ST-22) chassis. Just about the only way you could possibly salvage the actually-not-that-bad-looking 3G Eclipse is with a General Electric Turbojet mounted in the trunk. Like this 2003 Mitsubishi Eclipse found here on eBay
with opening bid of $24,000 reserve-not-met with 5 days to go, located in Reno, NV. Tip from Neil.