Greyhound, Megabus, and Chinatown Buses all offer the same service. My favorite besides Bolt Bus is Megabus. Google them for the websites.
I just took China Town bus to NYC. It was $20 for a round trip ticket. The buses are clean but the lady at the ticket counter was a *****. It lets you off in China Town in NYC and it picks you up at the same spot. Also try Mega Bus. I haven t done that yet but depending on how far in advance you book and what time of day you go it can be as cheap as $5 there and $1 back. Check the website. And Mega Bus lets you off at Penn Station in NYC which is actually closer to everything (Times Square, Herald Square etc).
There are many choices, picking up at various streets.Look into all the LINKS.
My husband commutes to NYC three days a week via megabus and i ve taken it myself.If you book far enough in advance we have found seats for $1 and even Free! Definitely check it out.Plus it drops off and picks up at 30th St Station Penn Station
You could always take PA s SEPTA to New Jersey then get on an NJ Transit bus. Very cheap, but it would be slow.
Amtrak