Simmons Kids Carter 6-in-1 Convertible Crib - Greenguard Gold Certified, Grey + Quiet Nights Breathable Baby Bed Crib Mattress and Toddler Mattress (Bundle) Carter Crib + Mattress Grey is up for auction in Baby Products. The current bid is $35.00, 89% below the $313.11 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.