Ebay offers Hexbug BattleBots Arena Max for $43.50 (reg $101.99) after code with free shipping.

Apply Code: BULLSEYETOYS50

Product Description:
Suit up your BattleBots for an action-packed match inside the bigger, better, stronger Arena Max, with more fighting space and new interactive elements! The new arena design is 50% bigger than ever before and has an interlocking floor tile assembly! Push enemies into the motorized auger or shove them in the corners of the arena to knock off their weapons with the hammers. With multiple Tank robot configurations, BattleBots fans can experience the excitement of engineering their very own fighting robot. This set includes past champion Tombstone and the Build-Your-Own-Tank robot. Come up with your strategy and beat the champ!

• Dimensions (Overall): 14 Inches (H) x 20.5 Inches (W) x 4.5 Inches (D)
• Weight: 5.53 Pounds
• Suggested Age: 8 Years and Up
• Articulation (posable joints): 2 Points of Articulation
• Number of Programs: 0
• CPSC Choking Hazard Warnings: Choking_hazard_small_parts
• Educational Focus: Science
• Includes: Instruction Manual, Batteries, Remote Control
• Material: Metal, Rubber, Plastic, Paperboard
• Battery: 9 AAA Alkaline, Required, Included