teeth whitening

How much does it cost to have it done by a dentist?
Can you recomend good over the counter alternatives?
I used Crest 7 day trays, the result was pretty good but not the best and didn't last that long. I want something better and more long lasting... Pls recommend

I have had it done before. It cost about $350-400.

The prices may have come down by now. But firgure its goign to be between $200 and $400.

DO NOT go to the place on the 'corner' that does teeth whitning. Those kids gets paid $10 an hour to do a job. Its worth E ERY penny to pay for a professional to do it.