You'll have an easier time finding a virgin in a ***** house, than finding good parking in Manhattan, especially over by W. 28th, and 11th.

 

You can sometimes find parking below 23rd (between west 22nd and west 17th and between 8th - 11th ave). I usually find parking on upper west or east side... Midtown and village (east or west) - fuggedaboutit

I found a 4-sensor + mini wireless display sold on eBay for $43 shipped (from Hong Kong). Unfortunatly, there are very few inexpensive sonar parking solutions that do not involve drilling the rear bumper... but after a respray (which my NYC battle-scarred bumper badly needs) they will integrate acceptably.