Final answer:
The legal term for an offer to buy or sell something is (B) Offer.
Step-by-step explanation:
The legal term for an offer to buy or sell something is (B) Offer. In this scenario, Ross sent an email to Neal offering to sell the coffee-making machine for $300. Neal responded with his offer of $250. Although this offer was not accepted by Ross, it still qualifies as a valid offer in a legal sense.