Maybe I would pay that much for a Sun Frost, but not for anything else.

Sunfrosts are probably the best out there for energy use but you really need to do the math.

some quick googling points out that sunfrost makes a 120V unit with 3.9 cu ft freezer and 10 cubic foot refrigerator that uses 249 kwh/year that sells for roughly $3095

GE makes a unit with a 4.11 cu ft freezer and a 11.44 cubic foot refrigerator that uses 363 kwh/year that sells for roughly $650

so that's 114 kwh more per year.

rounding my current electric rate up to 10 cents/kwh the GE costs $11.40 cents more to run each year. giving the sunfrost a payback period of $214 years.

Go insane with inflation rates and make it $1/kwh and the sunfrost has a payback period of 21 years.

Sunfrost may have been worth it a few years ago when you were going 100% off grid powered by solar exclusively but it's possible to get solar panels for under $2/watt. Sometimes $1/watt is possible and they keep saying they'll hit $0.50/watt in the near future as china's government subsidized factories ramp up to speed. It's cheaper to just buy some more solar panels then it is to gain the efficiency of the sunfrost.

You do have to do the research and select an efficient fridge since there are some out there that will use two or 3 times the power for the same sized unit but I'd be surprised if anyone can find a scenario where the extra cost of the sunfrost 120V units is worth it. They also make 12V units which is totally different market and I'm not sure how it works out mathwise.