We knew it was coming, now the WiFi only Galaxy Tab looks to have leaked with pricing in a Best Buy advertisement. According to some extracts obtained by Pocketables, a silver WiFi-only Tab will be available for $499.99 (a buck more than its WiFi-only iPad rival). Best Buy will also be selling a black 3G model (Verizon) and silver 3G model (Sprint) with contract or month-to-month plans. The "and up" verbiage is probably a hat tip to the $599.99 on-contract price that Verizon announce