Dear "Gaelle, Outside US", Contact a licensed realtor in Montclair or surrounding area, one who handles rentals, and you will receive professional service. A realtor listed rental carries a commission fee of one month rent, usually paid by the tenant but not always, and the security deposit can be 1 to 1.5 months rent held until lease is concluded, and the one month rent in advance. Sometimes utilities are extra. But at 650, if available, a small apartment might have heat included. You should contact someone, (973 632-8593 immediately as rentals go quickly. firstname.lastname@example.org.