You see it's not that easy to find somone who will exchange your paypal to BTC be it if you claim that you've been in this filled for a long time. You are an unknown in this community and also Paypal has a reversible transaction. You can easily get your money back. You can try other exchange site which offers buying bitcoina tru paypal. If you are buying as you've said you would buy thousands then go to local bitcoins or virwox.
The problem is that all the "normal" services like LBC, paxful, virwox ecc... require documentation.... alot of documentation...
I was used to direct trade with a partner, but few days ago he got an issue with his paypal account and can't support me anymore.
Since then, i've opened many virwox accounts and never got a withdraw. All accounts suspended.
I have also contacted many sellers but they require documentation or place limits that are too low for me.
it seems really hard and time consuming get those BTC.....