I am single and considering changing from a full bed to a twin bed to save space in my small bedroom. The mattress I use wasn't new when I got it and I've been sleeping on it about 7 years anyway, so I suppose it might be a good time to do some sleeping arrangement changing anyway.
I'm considering getting the Hemnes Day bed at Ikea. It's a twin, but has a very neat trundle design that can convert the bed to a full size quickly. This would be handy if I wind up not liking sleeping on twin, or if my parents come for a visit and I can give them my bed and I'll sleep on the couch. Also, if I wind up moving soon, I could use it for a couch/guest bed in a new apartment.
Ikea is having a 15% off sale until the middle of November on bedroom furniture, so that is why I'm considering this right now. Would you consider buying furniture at Ikea rather than most other furniture places a better choice, financially? I'm looking on Craigslist and cheap, quality beds seems to be hard to come by.