since escrow cannot be reliably used in such cases. Personally, I only exchange with one member here who is a very trustworthy btc/paypal exchanger. I would never trade here for any reversible currency with any newbie or non-trusted account. It takes time to establish trust, and yes, the system is broken in many ways, but for the most part, I find it pretty good overall, you just have to really pay attention to account sale and neg feedback ratings.
Actually, it can be as much up to 6 months - it's really not paypal's decision, it's the card that was used behind the purchase attached to the paypal account. For example, if I have a Mastercard and it allows chargebacks up to 6 months, I can do it that way if i was a scammer and had used that card for the payment.
Also, NEVER mention Bitcoin or crypto in any Paypal transaction in the notes, as I hear they will limit/lock your account and it will be a pita. I have never had this happen, but I have heard of many stories resulting from things like newbies putting in the notes "Thanks for the Bitcoins!!" etc...
YMMV... Good luck, be safe everyone.