The pre-buy on our last G-III took several weeks, a team of 5 in the hangar going over the aircraft, and two guys in a single wide going over the log books from day one.... Gulfstream used to charge $60,000 (ballpark) for this in 2000. It should be noted that a GIII was worth 8-10 Million U.S. in those days...
If it saved you from a several hundred thousands in oooppppssss, big repair bills, and losing your job...
FR