How much does this cost to the nearest dollar?

APC Smart-UPS RT 6000 RM 208V RBC44 Compatible Replacement battery pack by UPS Battery Center
New compatible replacement battery pack for APC Smart UPS RT 6000VA RM 208V Battery pack compatible with (Model # located on the back/bottom of the UPS) Arrives fully charged and ready to go - (1) Year Replacement Warranty! Easy Installation - Plug & Play - Hot Swappable - No downtime required Manufacturer UPS Battery Center, Part model number Batteries 1 12V batteries required., Is Discontinued No, Material Other, Voltage 208 Volts, Quantity 1, Battery Cell Type Sealed Lead Acid, Rank Computer Uninterruptible Power Supply Units 817, Available May 16, 2015, Batteries 1 12

Price is $500.00
Price: $499.99