I booked a rental car in Spain for £47.92.
When I arrived I was told that this rate required me to return the car with an EMPTY tank and that they would then charge me 40 to fill it and 121 for the fuel (A full tank cost me 55)!
The only way around it was to pay an additional 170 insurance. I chose the insurance option which required me to return the car with a FULL tank but they still charged me another 29.50 to refill an already full tank.
My 47.92 car cost me 221.42. A total ripoff.