Hardly anyone has the CUSL2 in stick right now, as far as big name retailers (BUY, NECX, etc.). Part of that is because one of their main distributors, Ingram, doesn't usually carry them. And the other major distributor, Tech Data, is out of stock. Pricewatch shows some smaller dealers with it in stock, but price has jumped to about $135-140 + shipping.
This isn't the FS/FT forum but I happen to have an extra one from someone who backed out of a system, never been used, everything is still sealed other than anti-static bag seal is broken as I made a general inspection of the board to make sure it had no defects/broken components/etc. Only downside is you wouldn't be able to return it to the original retailer, but the full Asus warranty is applicable (it hasn't been registered yet). PM me and make me an offer if you are interested ...
Are you definitely going to be overclocking? If not, there are other alternatives that are good boards.
Or, you could even go with the MSI if overclocking ...