Hello,
we have got very sound experience on Magento platform and have upgraded good number of websites in past and surely able to get you good job done for your Magento upgrade and PayPal and Ebay extension.
it's been 8+ years and 500+ projects we completed on Freelancer and request you to see our Freelancer profile. along with website you will get 60 days free support.
Best Regards,
Lx