teeth whitening?

i live in new york and i am seeking a professional dentist to bleach my teeth for an affordable price. any affordable places in where i can go? i have been to a few places that are charging $600. i don't want to pay more than $300. any suggestions will be great. thanks. i have tried the do it yourself options at home but none of them work. i am ready to save up the cash and have it done right
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i use a pre rinse whitening listerine mouth wash and crest white strips and my teeth are just as white as they would be if i did it professionally. also on ebay i bought a blue light thing that you put the whitening gel thats on the strips on your teeth ...it works like if you ever bought the whitening kit for while using tanning beds..its great
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