It looks like AT&T is now selling refurbished versions of the Galaxy S II.
You can get one for 9.99 with a new, two year contract. The contract
requires a $15 or greater data plan.
Link: http://www.wireless.att.com/cell-phone-service/cell-phone-detai Galaxy S(TM) II (Refurbished)&q_sku=sku5480279