This week, our readers were keeping a close eye on apartment deals (including a less-than-$500,000 three-bedroom) and pondering the future of the MetroCard. Below, the week's five most popular posts:

1. How to find out if your building has a J-51 tax abatement, and if your rent was raised illegally

2. Pay under $500,000 for this Manhattan three-bedroom—but read the fine print

3. With a budget of $200,000, here's what you'll find across NYC

4. Bye-bye, Metrocard? The MTA is considering alternatives for fare payment

5. This studio near the Second Avenue subway is so spacious it has room for a home office