Advantageous purchase is a term used to describe a purchase that is beneficial to the buyer. The crossword solutions for this term are 'STEAL' (5 letters) and 'BARGAIN' (7 letters). Stealing implies taking something without permission, while bargaining implies negotiating a lower price than the original asking price. Both of these activities can be advantageous to the buyer, as they can result in getting a good or service at a lower cost than what it would normally cost.