All items could use a good dusting or coat of paint but they're sturdy nonetheless. The chrome shelving unit would probably work better for storage or in a garage or workshop but disassembles for easy transport. You would need to carry whatever down one flight of stairs on your own because I can't assist due to back issues.
Bookcase sizes as follows:
Large white: 25x9.5x72
Small white: 30x9x30
Medium black: 23x9.5x40