GUys LOWES in my area has been clearance(ing) one of their snap together floors. The black and white tiles were $50.00+ per box.
My local store was selling the dark grey for $5.50 PER BOX. I bought every one the store had. Wich was enough to refinish one garage floor with a few panels to spare. I have not yet had a chance to checkout other stores for their stock but you can rest assured if I find another stock of those panels I will be loading up my truck again, these panels are about 20" square.
Good luck