I'm thinking about selling my grandfathered ATT unlimited plan. I know the value has plummeted since ATT announced they are now throttle eligible. A look on eBay and prices are all over the place -- hard to tell which ones are legit and which are fraudsters. Some "buy it now" listings are $120 including a month of service. Not sure why anyone would bother listing if that is all they can get. Others recently sold for $500 but current listings include $500 or best offer and they are sitting. So I'm a bit confused as to the real market value and if there is still a market. Anyone recently sold theirs or have any insight here?