You are not speaking to eBay here, but to members like yourself.
Anyone of any age can own a debit card, but you have to be 18 years and older to own a credit card, hence this is the only form of age verification eBay accepts, for certain items which law of the land states, you have the be, 18+ to buy.
The only way round this, is to ask a friend or family member, who has a credit card on their eBay account, to buy this restricted item for you.
@pesti_ja
@pesti_ja