Historical clue formulations

• Last-minute bidder on eBay — 2023-09-03
• Long shot? — 2020-08-19
• Marksman with an M40 — 2017-04-24
• Good shot? — 2016-08-14
• Hidden shooter — 2013-03-12
• High-precision rifle user — 2012-06-03
• One taking potshots — 2011-10-04
• Last-second bidder on eBay — 2011-01-23
• Concealed shooter — 2004-09-07