This site will give option to buy a items in the ebay but you need to add the ebay purchasing link in this site and current price of the product in bitcoins. Mention the email you need a bill for the item you purchase.
http://btc-market.net/bitcoin/ebay-item-purchase.htmlSeems like that link doesn't work anymore...
I don't see a method in google to buy a gift card or exchange bitcoin in to gift card but i saw a site i don't know if its legit or not
https://www.egifter.com/bitcoin/I never heard this but i found this in top 10 rankings in google.. But if there is someone who already tested that site i hope someone inform us here to know if this is legit or not..
Ebay gift cards only works for U.S Customers and no more else...
Debit cards are not available in some countries (Venezuela is blacklisted as defect).
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So, no one knows how to buy on Ebay with BTC. We just could buy on Amazon -thru Purse- and Aliexpress -thru Shopawl-, not else.