tie-down n. one of a series of questions that encourage a customer to agree to a purchase. (source: Double-Tongued Dictionary)
Further reading
In 1916, a small-town newspaper in Pennsylvania printed a fanciful item about a local gathering with a guest list that included, among others, Miss Ella Vader, Mr. Ray Zor, and other punny names. This is part of a complete episode. Transcript of...
Zack, a railroad conductor in Omaha, Nebraska, wonders about a bit of jargon from his profession: tie up, meaning to “clock out,” or “leave work,” as in What time did you guys tie up yesterday? This usage is referenced in The Railway and Locomotive...