(AUS) My client for a commission insists on using Paypal, and is willing to pay $500 for a cat digital painting

A person reached out to me on deviant art asking for a commission of his cat. I am far from a professional artist, but I consider myself alright. We switched to discord because ‘[he] can’t send images’ even though it is an option on deviant art for images.

I set up a ‘buy me a coffee’ page for commissions and tips. I was thinking maybe 60aud for the painting, 75 at most. I accepted his dm, he sent me the photo and said ‘I’m willing to compensate you with $500 usd I really want the best from you please’ (which is 760aud.. a lot of freaking money)

My paypal wasn’t working very well, so I just asked if he could send it to my website, he kept insisting on using paypal so I just created a new account. The account has no money, I literally just created it.

I just don’t really get why he offered so much money? I didn’t even tell him what price I was thinking, it was 9 texts in he told me $500. I require a 50% deposit, I’ll send them a finished watermarked painting and then when they pay the full price I’ll give them the full file. Why is he giving an armature artist so much money? Is there any scam going on? I have 0 dollars in my paypal account, what is he trying to scam? A watermarked image of a cat painting?