On Trulia, click on the "Rent" tab at the top of the page. You can type in East Harlem and find properties that are for rent in the area. Rents can vary, even within one geographic location so unfortunately there is not an exact answer to your question. Many variables factor into what a landlord charges for rent - ie: # of bedrooms, # of bathrooms, size/square footage, location, etc. Checking into your local classifieds will help you identify what the rent would be for the type of property that fits your needs.
Jenny D Johnson