I think you'll be hard-pressed to find a current wireless printer for under $100, you got a great deal on that 5850...(not quite as good as the one I got, after rebates I actually made money 😀) but until stores start lowering prices anticipating new models, I doubt you'll get a new one for any less than $125 or so.
That said, the best deal I've seen recently on the new 6840 from HP was $99 after a $100 MIR.