Suspicious activity obviously means he was using a different ip so paypal locks the money when he sends it probably because he's trying to scam you using a proxii. Some good software on your website can combat this. For the usual seller stick to low paying chinese guys or people you trust.
I wasn't using a website...and it was a transaction through ebay....paypal will claim its a suspicious transaction if it exceeds $1000 and you don't do business like that all the time, saying that either you stole it or it was stolen...its not a one time thing...it happens all the time. And this was before two factor authentication was in place..paypal didn't check IPs on a whim....they did it after there was a fraud claim...my account never had one of these claims and its still sitting in their DB locked away...or deleted by now more than likely. The only response I ever got from them was there wasn't enough evidence one way or the other. You may have had your luck with paypal and a website...but that still doesn't protect you from scams...there's the old change payment amount scam, socks *****s through the persons pc you stole the account from, etc etc. Your method is far from fool proof and a fairly competent blackhat could still make your life with paypal hell.
Skrill is the one most use that I see lately...there are a couple foreign ones that won't side with the anyone and just dont care what you do (WM) but those can be shut down by the feds for laundering for the bad guys at any time too...I'd suggest skrill like a lot already use.
Just sell to companies. I have sold in chunks of 100k at a time and have yet to have people do any chargebacks or anything.
