Probably not as lucrative as many above, as my emerald with JL don't give me elite upgrades: AA once ran a very limited time promotion where $160 one-ways were available between LAX and MIA early this year. Scored a round trip at $320 on 772 and 77W, with flagship amenities (Casper bedding, full meal, drinks), got $100 voucher due to an INOP seat (has to manually switch to bed mode by the FA), and obtained 13450 JAL miles.