Sorry for the very late reply. I just saw your question. Are you still interested in your original question topic from last summer? I'm not a real estate agent or broker, but, I have lived in Hudson County for most of my life.
To answer your original question: Yes, it is possible to find a nice, decent condo or co-op in a nice, decent area in North Bergen that is reasonably close to transportation to NY for under $100,000. But, these condos/co-ops will be those with one bedroom. Also, you'll need to check on things like the "pet policy" if you have any pets, and so on. Here are some links:
I don't have personal experience with real estate agents in this area but I have heard very good things about
http://www.trulia.com/voices/profile/Real_Estate_Pro-Edgewat She also has listings at http://www.realtorkaili.com/.
One piece of advice: Avoid any property on River Road or right on the Waterfront. Why? These properties often require extra expenses such as flood insurance, not to mention the need for you to purchase new furniture and personal home items if/when your property becomes flooded from the Hudson River.
Hope this helps! If it's too late for your original purposes, I hope it helps for your long-term goals for buying a property. Kindly let us know.