One month free!

No — two months free!

Wait — three months free!

Owner-paid commission! Complimentary gym membership! IPod!

The past year has, unquestionably, been a renters’ market in Manhattan. As real estate values plummeted, landlords piled on the enticements, special offers and gifts — all to get people to commit to leases at prices that would have been considered unimaginable bargains a few years earlier.