Since 2018 - a lot of new 12 volt DC fridges have entered the market in the sub $600 range.
Most of these are Chinese "white label" fridges that do not use a Danfoss SECOP compressor. By white label, I'm referring to those units built at one or two factories for a multiple of brands that one sees on Amazon.
ICECO is the exception to the above. Their offerings at priced about $200 higher than the above "white label" 12V DC fridges - but all but one or two of the ICECO units utilize a licensed Danfoss SECOP compressor.
Interestingly, three of the ICECO offerings, the JP30, JP40 and JP50 are housed in cabinets that are identical to the Indel-B chest style fridges. ICECO also offers a pro range with prices that begin in the $700 range.
An important caveat emptor to consider when buying a Chinese "white label" 12 volt DC fridge is what if something goes wrong, who are you going to call as opposed to a couple of the more established brands? Correct me, if I am wrong, but both ARB and Dometic have customer representatives here in the USA with a 1-800 service number. It is something to consider should the fridge have issues soon after the purchase.