Sorry for the delayed response, I went to lunch.
This is in Southeastern, PA. Bucks County to be specific. And it is not just those with 20+ years. I'm sure these are Master's holders, but nowadays getting your masters can be done from your own house on the weekends, and, in Pennsylvania, also reimbursed by public funds.
Here are some examples:
$97,236/year (10 years exp.)
$73,239/year (5 years exp.)
$53,626/year (2 years - Elementary)
$57,941/year (1 year) - Basically a starting salary for this area.
In our neighboring County, Montgomery County, PA:
$103,480/year (15 years exp. - Elementary 1-3)
$96,991/year (12 years exp.)
$93,500/year (9 years exp.)
$82,455/year (13 years exp.) --- This teacher is teaching in a District that is currently on Strike, as well.