I'm travelling to Las Vegas again at the end of April from the U.K., and would like to know of any locations in Las Vegas where dealers have chips on show and for sale.

I know about the museum and shop at the Tropicana, and also that when I was last there in October that the Gambler's Store downtown no longer had any chips for sale. But are there any other places where you can see a selection of chips for sale or trade? Thanks for any help & advice.