The BlackBerry 9800 slider phone hasn’t been unveiled just yet, but a NYC retailer, Mobile City Online, has already decided to begin accepting pre-orders for the device, and has priced it at $600. The phone on offer is an AT&T locked version, and boasts specifications such as BlackBerry OS 6, Wi-Fi, 512MB of RAM, and 4GB of built-in storage. There’s no confirmation as to whether such specifications are accurate just yet, but hopefully RIM will be announcing this device sooner rather than later, and we’ll be able to check out this phone in detail. Speculation is that the BlackBerry 9800 slider will be arriving later in August.