LOL @ some of the suggestions,
I have one like this that I have had for a few years. I paid $5 for it at a church yard sale. http://www.amazon.com/Allen-Deluxe-2...9129838&sr=1-1
The swing arm allows it to go on a regular car trunk or on a hatchback/near vertical. I have used mine on a few different kinds of cars and works well on all. Did a 1,700 mile trip with a china girl build and a bunch of short runs with HF 79cc builds. 70 to a little over 100 lbs.
Would be sure to check it's max weight!