In order to be approved for ebay partner network, you must have established sites on the internet, and have the ability to upload a file by ftp to your hosting. Unless you already have a site with quality traffic, it is very hard to get approved.
From the ebay partner website
Before applying to the eBay Partner Network, please ensure that you meet the following requirements:
1.You own and operate the website for which you are applying to promote eBay.
2.The website is functioning, relevant for promoting eBay, and has unique or value-added content or functionality that will drive incremental purchases on eBay.
3.You are in compliance with the eBay Partner Network Agreement and Code of Conduct.
4.You have a working phone number and a valid PayPal account or bank account, which can receive direct deposits--you will need this payment information during the application process.
We receive a large number of applications on a daily basis and review each application and site individually. While meeting all of the requirements above does not guarantee automatic acceptance into eBay Partner Network, doing so will ensure your application receives proper attention during the review process."
Hope this helps you, and welcome to Hubpages.
Hubpages also has an FAQ that explains this