Crossrock Poly Carbon Cello Case for 4/4 Full-Size | Matte Blue Finish, Wheels, Lightweight & Durable – Best for School Orchestra & Student Musicians 4/4 Cello Case Blue is up for auction in Musical Instruments. The current bid is $72.01, 87% below the $559.00 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.