In the area of interest (N metro Boston), I see similar units renting for 1000 - 1200 a month, + tax / condo fee (200) giving me about 400 a month income.

Go to some open houses, especially for similar properties, and chat with the agent.

However, I belive this program is going to be phased out within the next month or so but is likely to be replaced with a similar program.

Has anything nearby and similar sold in the last 90 days?

There are several organizations out there that provide similar service offerings and in my opinion, it is only a matter of time before these kinds of services become conerstone tools to help you grow your business and claim your fair share of the marketplace.

You would need to find properties that have recently sold in the immediate area (the more immediate the better) that have the same or similar characteristics and see what they sold for.

Similar, though to a lesser extent (for now) for music, and, to an even lesser extent for video or cars.

Similar to a subject to, but not the same.

I need something that will "know" what the user is looking at and target them.Picking my adverstisers will come in handy for other options.I may do google adsense and then just sign up for affiliate programs of a few key sites that are similar to mine.

I am similar to you and am drawn to rehab because it is what I am comfortable doing, but please understand that it is the most expensive and the most risky proposition.