subway line under a building is that dangerous??

Suppose it isn't dangerous, why would you want to move into a place with subway vibrations?

bed vibrates without a quarter?

But now or be sorry forever.

Very dangerous.

Buildings have collapsed as a result of each of NYCT's subway lines with the exception of the G train. Recently the 9 has been the most troubled.

a little mean gay lord here??

I once knew someone who lived above a subway line and one day he went to take out some crystal champagne glasses that hadn't been used in a while--several of them shattered at his touch. Seems the years of vibrations had rattled them to the point that they were no longer fully intact. If you're planning to live with artworks of any sort--paintings, pottery, tiffany lamps, whatever-- I'd advise against choosing a location that will be affected by train vibrations.

"why would you want to move into a place with subway vibration"

People will put up with any indignity and pay any amount of money to live in the "best" city the world. Normal amenities like washer/driers, dishwashers, and a place to park your care are considered luxuries for the rich if you live in New York City.

I doubt it would be a problem in an old building, but if it were new construction, I'd be concerned (what, with the cost-cutting-crappy-construction in new buildings).
I imagine the price is low, to reflect the fact that the apt vibrates. Plus, there's going to be a limited pool of buyers when you try to sell in the future.

I agree w broadwayron. I would be more concerned with a new construction (lower quality construction, less time for the building to "settle", etc) than older construction. that said, I would be concerned with this bc even though the structural issues may be OK, you may find your belongings breaking/weakening, or having to fix mini-cracks in the walls or replastering more often. Plus for resale value, why expose yourself to a potential negative that may remove a certain amount of buyers from your potential pool of purchasers?