OP, you sounded unsure of yourself in your first post. But in your second post, you claimed to "know the risks". If you knew all the risks, then why did you ask for advice in the first place? There's no problem with asking for help, but I guess I'm just confused as to why you're disregarding the advice of literally every single person who has replied on this thread.
Look. The fact of the matter is, there are lots and lots of people who LIE about the horses they're selling. There are some things that not even the seller may know, that only a vet would be able to tell. I once looked at a stunning 8-year old foundation QH whom the seller thought was perfectly healthy. After a vet checked him out, he told me that the horse had arthritis and would be unridable by age 12.
There's a lot more honesty when it comes to word of mouth, but the internet is where the scammers go to fish for stupid people. No offense, but it would straight up be stupid of you to buy this horse without knowing hardly anything about it, and with PayPal of all things.
But hey, it's ultimately your decision. Maybe you get ungodly lucky and end up with your dream horse. But as of right now, the probabilities are not stacked in your favor, my friend. Anything that can go wrong, will go wrong, but doubly so when it comes to horses.