I'm moving in with my boyfriend and thus have to sell my bed.
IKEA bed frame "Brimnes" (queen size, lots of storage space underneath the bed)
http://www.ikea.com/us/en/catalog/products/S89902930/
and "Sultan Favang" mattress (nice and firm!)
http://www.ikea.com/ms/en_US/pdf/buying_guides/SULTAN_BG_100213.pdf
includes "Sultan Lade" slatted bed base.
Everything is 2 years old and in excellent conditions (mattress protector used from day one). Price for new items: 129$ (bed frame), 329$ (mattress), 30$ (slatted bed base), total (488$). Asking 350$. Queen size duvet and 2 pillows for free in addition if you're interested.
Pick up in San Francisco (Noe Valley), anytime before June 1st.