So...what the deal with Enchanting Antiques on Geneva?

Mob front? Tragically misguided antique-loving elderly couple? Portal to hell? One of those twilight zone places where buying an antique leads to my doom via hubris? No one ever seems to go in and out, and that mural is unsettling in a way I can't quite understand. Please help.

Mob front? Tragically misguided antique-loving elderly couple? Portal to hell? One of those twilight zone places where buying an antique leads to my doom via hubris? No one ever seems to go in and out, and that mural is unsettling in a way I can't quite understand. Please help.