Oncpcare Deep Guinea Pig Litter Box with Metal Grid, Plastic Bunny Litter Pan Potty Trainer Tray for Small Animals Guinea Pig Ferret Rat Ideal for Cage Training and Easy Cleaning (15”x12”x4”, Blue) M (15”x12”x4”) is up for auction in Pet Supplies. The current bid is $1.00, 97% below the $38.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.