A) check consumer reports
B) Drimmers on coney island avenuehas been cited in mumerous even non-jewish publications as having some of the best buys and friendliest staff
C) look for good warranty and return policy.
D) Lowes has many reasonable priced fridges for the size and description. It is very easy to get ten percent discount coupons for lowes from various sites online, or from people willing to sell them on ebay for two-three dollars. You will save sixty bucks on a six hundred dollar fridge.
E)PC Richard also is a good place there are a few in brooklyn they are actually advertising a few 18-20 cubic foots for with a fridgidaire starting at 429 for 18 cubic foot
f) You should fill up the fridge for many simchas and happy occassions!