I bought a backup camera for my sons' 2006 Eclipse and I just finished installing it in his car.
The 4th GEN Eclipse is notorious for terrible rear visibility and the 7th GEN Celica isn't great either. This camera works pretty darn good in his Eclipse, so I'm thinking I may install one in my 2001 Celica GT.
The installation in my sons' 2006 Eclipse was a pain. I fished it through the headliner (with power as well) and around a multitude of body panels. The camera I used has a dashcam built in and the screen clips to the rear view mirror. The only pain is, it has a power cord which plugs into the acc car outlet. With my sons' car, I mounted an outlet in the trunk and fished the power cable through the headliner and it plugs in, in the trunk.
I'm sure lots of members have installed backup cameras so I'm looking for the best solution. Also, the easiest route.