Thuma twin bed frame (https://www.thuma.co/products/classic-bed?variant=41990881706089) and Helix twin mattress (https://helixsleep.com/products/midnight-luxe/twin-glaciotex). I bought these in Sept. 2022 for a guest room and the bed has been slept on maybe 5 times at the most. The frame has Japanese joinery and is easy to assemble. $1000 or a serious best offer.