At my Costco - east Tucson - on Tuesday no PS3's. But they did have a stack of those Samsung 1400s for $449 - unless they've replenished stock from a week ago, it looks like they sold one. Not surprising, since it's now $339 at Amazon w/ no tax & free shipping.
They've added a stack of Sony 301s for $399, with a large promo sign advertising a free copy of Spiderman3, if purchased on the same receipt as the player. The stack look untouched. A quick check of the DVD section revealed . . . . . yep, they still don't carry Blu-ray or HD DVDs yet, so a bit of a challenge to get that free SM3.
The best deal appeared to be a stack of Toshiba A3 HD DVD players for $179. About half dozen of the players seemed to be sold.
Still, I think I'll stick to Costco for food & booze, and online for everything electronics and high-def.