Two examples from my life - a friend is a headhunter for tech companies. My last job was been him hitting me up before the job was advertised - I had met the hiring manager and booked an interview before they saw my CV or anyone else even applied to the job.
There’s a major sporting event in my city every year and the tickets sell out within minutes every year, the good ones gone to season ticket holders years in advance. A colleague is a season ticket holder and not interested in that particular game so the last few years I’ve gotten his ticket for less than face value for the cheap seats.