Where can I buy or download the soundtrack for Fairy Tail? I would like to purchase/download the Fairy Tail OST, but I don't know where/how. Not the physical disc(s), but the digital file(s). Sources, online stores, instructions, etc.? 

Thanks so much!
You can buy it from sites such as Recochoku. As for payment method you can choose Webmoney and buy the Japan Webmoney prepaid code from another site (just google for it - there are quite many choices). It's a roundabout way but probably cheaper than buying it imported at wherever you're living in. Oh, and being able to read Japanese is a must, since most of these sites don't have English translations.