I told the staff in Cambridge, Mass about how people won't pay $150 for a Matias Tactile Pro unless they were out on display and allowed people to type on them, and they responded by letting me try it (they opened the box and let me typed on it). They said that they had issues with people stealing keyboards out on display, though later, they'll get some fold out trays or something for people to try the keyboards.
My local one has Tactile Pros, Adesso MKB-135Bs, and Black Widow Ultimates. Also at least one Micro Center stocked Unicomp Space Savers before, on open display.