Philadelphia, PA to Amsterdam, NY buses and trains from $62

Here are some trips other travelers have found on Routefriend.
$62
7h 42m
3 stops
NJTransit Amtrak
$63
5h 49m
2 stops
NJTransit Amtrak
$71
5h 19m
1 stop
Amtrak
$87
6h 54m
2 stops
BoltBus Amtrak
$105
8h 45m
3 stops
NJTransit Amtrak