Amazon.com: Ner Modulus Round Counter Kit : Toys & Games
Don't know if these are the lowest prices, but Amazon has the Rampage for $33, the Retal (White "Elite XD" version) for $30, Modulus Ghost-ops Chrono barrel for $15 (used to be
Buy Nerf Modulus Ghost Ops ChronoBarrel Online at Low Prices in India - Amazon.in
Amazon.com: Ner Modulus Round Counter Kit : Toys & Games