wow, wilson syn-gut installed for $22.
You would need to drive to my house and string it on the spot for that $$$ mark-up. Just kidding-
I know shops can charge $20 labor, but they have overhead and only give the stringer about $10.
Getting certified will help your cause, but you need to drop you labor charge a bit-
MRT '94. "Stringing like the wind" for the Joe's and the Pro's
Babolat Star 3 w/120K+ frames(what a workhorse!!!). Baiardo just for weekend kicks