This exact thing happened 2 me, and the reason was, because it depends on the Country you are buying the item from. Paypal has a list of, "high risk", Countries, and if you try 2 purchase from said Countries, Paypal will not let you use, "instant transfer", so that they, "supposedly", can protect you and your transaction, (from the big bad wolf I guess, lol). They will also do this on item's that are even in your very own Country, if the item, or items, are high priced items, (ex: $2000, or $3000 dollar items, etc.) I hope this helps
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