Saris Bones 2 bike holding rear bike rack. Retails for $120, sell for $75.
I never used this on my vehicle. I purchased it for my car and then my wife totalled my car the following week. It was replaced with an SUV and this has been sitting in storage ever since. I did use it 2 times before storing on my friends Scion Tc. It works and looks like new, your bike doesn't budge on a rack like this. Don't buy the Academy or Walmart Specials, for 40-60 bucks. I almost lost a bike on one of those due to faulty rubber strap.

http://i236.photobucket.com/albums/ff255/joegen4e/CIMG8177.jpg
As mentioned in my other posting in the fish related section, I am up for aquarium related trades as well. I am hoping to setup a 20 long tank with stand and some standard lights(freshwater).