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It's gonna take the script from here http://myahbuddy.com/auction-archive/front.php and integrate it into wordpress http://myahbuddy.com/price-selector/ with a better gui. The region, faction and realm options will be the options that determine the purchase details. The download and upload buttons will need to changed to an add to cart button when purchasing. The script will need to have a dropdown menu to show previous purchases showing it as region - faction - realm and then have those fields greyed out if selected from previous purchases dropdown and the add to cart button converted to download and upload buttons similar to the script already. Once the customer has purchased the file, they can also download it and view the details from their account on the wordpress site.