There may be, but by this way you will loose many bucks for the name of transaction charges in 3 sites i.e. PayPal, AlertPay and the Mediator.
I used to invest my paypal money in PTC sites linke neobux, then withdraw it after 30 days to alertpay
That option isn't possible because in neobux, they force you to withdraw by the same payment method that you use when buying referrals/upgrading your account ..etc
There are many reputed exchangers. Even you have alertpay approved exchangers. See here https://www.alertpay.com/Exchangers.aspx
pls who can help me pay with paypal to fiverr.co and l will pay him with libertyreserves pls contact me if intresred