Answer: tradeup

AnswerCrossword Clue
TRADEUPGet the better end of a deal, say
TRADEUPSwap the old for the new
TRADEUPSwitch to a better model
TRADEUPReplace one's old car with a better one, say
TRADEUPExchange for a better model
TRADEUPGet something better
TRADEUPGet a bigger car, say
TRADEUPBargain adroitly