Id first get a Kill-a-Watt and check its consumption-efficiency, it will record KWH used over 100hrs to give you a log, other units can log data to your computer for longer tests. If your unit is recessed what I did was enclose the recess in 3" of R7.2" foamboard on 4 sides, Feel your fridge, its cold on the outside, the insulation value on old models is very low, on new units it is better but not optimal as size of the unit would be excessive, look at Sun Frost, they use apx 6" of foam to achieve their high ratings which I have matched with a Sears. If you have the room for any insulation in your enclosure you can dramatically improve efficiency. That how I got mine to 4.3- 5$ a month to operate. A new top line recessed unit with added insulation I think could do as well from my viewing the Yellow Energy Tags consumption rating. With utility trends electric costs could be 40-80% higher in 5 years, this month I go up 15%. The life of a fridge is 10-25 years so plan for the future. You might save at .12 kwh 250 a year, at todays costs, it will be higher every year as electric costs increase. Only you can run tests to see what you could save. Many recessed units are superior in design, but don`t forget there are allot more things to wear out than just the compressor, everything has a design life, next year it could be the condenser coil leaking and be un repairable, etc, etc. If it was an antique Mercedes it would obviously be worth restoring since values go up every year. Only you can run numbers, but you likely have the option to insulate the enclosure to make it more efficient.