A lot of ebay sellers list btc/altcoins like this
Buy a pen get x amount of btc/altcoin free
That way when they send the pen in the mail with tracking paypal can not reverse the payment. Or at least that is the assumption.
Until the fraud, hacked or dog ate my PC accusations come in.
Yup, I lost a whole bunch of Litecoins that way last year.
Lesson learned. Never use Paypal for crypto transactions. Never ever, ever!