Historical clue formulations

• Shook on it — 2022-08-30
• "It's a deal!" — 2018-07-08
• Said "yea" — 2010-12-05
• "Deal!" — 2009-05-21
• Shook hands (on) — 2009-03-16
• "I concur" — 2008-08-24
• "You're absolutely right" — 2008-08-22
• Matched — 2006-09-22
• "No argument here" — 2005-03-12
• Consented — 2004-09-13
• "We've got a deal!" — 2003-03-20
• "You've got yourself a deal!" — 2002-10-19
• Shook hands (on) — 1997-11-06
• "Deal!" — 1997-04-27