You might have seen Motorola's WiFi-only Xoom popping up at European e-tailers , but it's reportedly flying the red, white and blue today, having materialized at Sam's Club in the good ol' USA. Droid-Life stumbled upon several snapshots of these Xoom Wi-Fi vouchers, with a $539 price tag hanging above their heads -- plenty cheaper than a cellular Xoom , and also slightly more affordable than a similarly specced iPad 2 . Of course, Sam's Club deals in wholesale merchandise, and even should this price be accurate the tablet may not be widely available at the same rate, so don't count out $599 as the Xoom Wi-Fi's MSRP. Meanwhile, let us know if you manage to find and ring one up at the register, eh?[Thanks, Michael]