Some experienced, well trained, 1st world developer is not satisfied with $300 for 5 minutes of his oh-so-superior work on FOSS software? Please excuse me, while I try to parse your statement in some nice way...
Personally, I'm a senior dev making more than triple what I did when I started my career, and if it were five minutes of work (or even ten, or an hour) I'd be extremely happy with $300.