I mentioned on the previous post that the proximity of the Cambridge and Arlington locations may be a con for them. Even for people without cars they are relatively accessible, and they're extremely convenient for people-of-car. They may not want to undercut those locations (for all I know those locations can't afford to be undercut), and they may see a Davis Square location as unlikely to get enough people when there are already Cambridge and Arlington locations. Even though you may know lots of people who would appreciate the convenience...profit margins in the grocery business are incredibly thin, like 3% or something, and it is insanely easy for groceries to go out of business. Even a relatively small overlap among the Cambridge, Arlington, and hypothetical Somerville locations might torpedo all three. Add into that the extremely nearby Porter Square Star, which is definitely not the same kind of store as Trader Joe's but can pretty easily accomodate someone's grocery needs...*and* MacKinnon's *and* a farmer's market half the year *and* convenience stores...