I've loved this loft and have used it as a mini "living room" with a couch and also a mini "closet" now, but where I'm moving to doesn't have space for it
It's a IKEA stora white loft bed frame in good condition. Fits up to a full size mattress and also I have a hack for a twin mattress and storage/minidesk. Free if you can come pick up and disassemble it before June 30! All assembly instructions and tools available. The white model is no longer available at IKEA

The first 3 photos show more clearly what it looks like and other people's arrangements of the space. The last photo is currently in the room, but the camera angle couldn't capture the whole structure.