[ryuurui]

I understand that this would be an answer to a question: where did you buy it? Naturally, no one will say "I have ...blah blah". You omit the "I have" part, and go straight to "それはパンやで買った", which is the same what Kyle said, and I only added "this". Also, if you talk about an item you hold in your hand (which would be natural as you bought it), your reply will be KORE and not sore. Bear that in mind. And if you want to make it more polite, you change 買った to 買いました.