eBay

I am interested in buying a RV and they want there money in $200 E bay gift cards???? I watched a scamming video on U tube and that's when they say NO NO NO. And the Order ID# is only 10 digits isn't suppose to be 12?

I'm looking to buy a 1997 Coachmen Camper off Facebook Marketplace and she says she is selling it on Ebay, how do I go about verifying it's legit?