It's not legit until it's in your hands

How do you know he didn't send you an empty box or a box of adult toys?

you never hear of the psu size box

scam to circumvent refund on 2 Blast Cities in Chicago?
I wouldn't put this past Omar.
Basically some piece of crap with the last name Fernandez (KOF) on Klov escalated a refund for 2 Blast Cities and sent back a box with a Blast City harness (the size of a Blast Psu)and that was enough for paypal to side with the scammer as he provided tracking. It didn't matter if the box was the size of a Blast psu...they thought he returned the Blasts and got to keep the money and both Blasts. True story.