Anyone know anything about these guys out of Philly? They have a .5ct total weight princess cut pair of stud earrings (FG, VS1) available right now (with 4 hours left) available at a very cheap price (not so cheap it''s scary, but slightly less than available for the same size at a pricescope vendor). If anyone said they were great, I might consider bidding in the last minute at this good price--they do have what they say is a return policy. Any thoughts?