How to Avoid Scammers on Pinkbike

[nmrt]

Thankfully, I have not been scammed on a bike/bike part transaction...yet. However, today it was sort of close. I found a groupset on Pinkbike for a good deal. It was about $400 - $600 less than what it would have sold for on ebay. I contacted the seller and it seemed mostly legit but still fishy. Why the low price, I thought. The components according to the seller has less than 15 miles. But it looked more worn than that. These were the sort of red flags.

Anyway, usually scammers take Zelle, or Venmo, or Paypal Friends and Family as payment. Yet, this groupset seller on PB preferred Paypal Goods and Services as Payment. I wanted to buy the groupset knowing that it would be covered by Paypal. Yet, I could not make the transaction because I could not get over why the seller was selling it for $600 less. In the end it turned out that the seller was a scammer according to Pinkbike.

So, here is my question -- why would a scammer take Paypal Goods and Services? What is their angle, and what am I missing?