作為賣家, 會唔會比買家呃?

我係yahoo賣緊一樣野, $300起bid, $600即賣,
但係有個人sd以下message比我

Dear seller, My name is Tina Falls From Ca,USA,I am interested in Buying your item which i saw on Yahoo auction. I will like to pay HKD 2500 for the item I will make my payments via Online Bank to Bank Transfer which as I was told is reliable and secured.i will require EMS SPEEDPOST for the shipment I will only need your bank account information so as for me to make the payment through Bank to Bank Transfer

會唔會比人呃呀?
風險高唔高?
各位有冇類似ge經驗呀?