Gently used Kura loft bed:
https://www.ikea.com/us/en/p/kura-reversible-bed-white-pine-80253814/
Comes with the mattress: https://www.ikea.com/us/en/p/asvang-foam-mattress-medium-firm-white-80481415/
And mattress cover: https://www.ikea.com/us/en/p/grusnarv-waterproof-mattress-protector-60522153/
And floor pad for when you flip the bed so there is a play area underneath: https://www.ikea.com/us/en/p/plufsig-folding-gym-mat-pink-red-00552275/#content
And organizer: https://www.ikea.com/us/en/p/moejlighet-bed-pocket-blue-00421393/#content
There are some stickers on the bed that my child put on but they can be removed.
The bed is partially assembled, or rather partially disassembled. It was in use for 3-4 years and now my daughter has outgrown it. Rather than take it all the way apart I took it apart into bigger chunks so it is easy for you to transport and reassemble. Will still need a minivan or pickup to transport, or you could disassemble it further to put it in a car.