I went home and checked my electric timers, thanks to your prompting. The mechanical style (with the pins) was at 2.6W, the digital was at 0.5W. Then I got into checking all the random really low stuff in my house, my microwave was at 3.5W, my TV was at 1W. It seems funny to me that the microwave is higher.
Running the numbers, if I put the microwave on a timer for 8 hours (overnght), I'll save $1.40 with the timer that is currently sitting on a shelf, retail value is about $10 for the timer. In my location that also saves 5.3 kg of CO2/year (out of 4000 kg that my house currently consumes).
Admitttedly small numbers, but I like calculating random stuff.