I am a "Serious and Good Musician" as you stated you could not find on craigslist, however, I'm also 60 years of age.
I personally don't want to waste my time playing with a bunch of 20 year olds playing "Trash Music" and by the same token, the youngsters think my music is trash and don't want to play with a 60 year old.
I have placed ads myself on craigslist and answered a few ads that others have posted, and for the most part, once we meet in person, it's obvious it won't work.
The main problem as I see it is that when placing posts people are way too vague and don't give enough of the right info.
For example: somebody ought to state up front that they are 60 years old or 25 etc... and "Anyone" yes "Anyone" that is a good musician ought to have the audio and video files to back it up.
I won't even entertain an Ad I see on cragislist if it doesn't contain samples of the person's playing ability.
Whenever I post an ad, I specify my age, location, what type of music I prefer, the instruments I play, specifically what I am willing to do or not do, and I always provide links to my music samples so the potential viewer can check it out.
Everyone ought to do that and that would solve a lot of the problems.
If somebody has no samples to post or isn't willing to post any, then more likely they are not really a musician, rather a wannabee.
I think for the most part, Most of the folks posting ads here are young kids (18 to 25) that "Want to Play" but really aren't any good and don't know what to do. Also a lot of the posters here are just trolls that like to stir up trouble. You can't get away from that, the internet is full of them.
do NOT contact me with unsolicited services or offers