Magento customization redirecting customers based on zip code

Avg Bid (USD)
Project Budget (USD)
$50 - $600

Project Description:
I have an company that have resellers on different cities. What i need to be done is to:

1: On the product page, there will be a field for inserting the Zip code, and the customer will be required to insert his zip code, to be able to click on "Buy", and proceed to the next page.

2: The next page, need to be defined based on what zip code area the customer inserted. There will be initially two types of pages: 1:Cart page or 2: Form page. If the customer enters the zip code of an area that has a reseller, he will be redirected to the form. If he enters the zip code of an area that has no resellers, he will be redirected to the cart page.

Skills required:
eCommerce, Magento, PHP
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