Seems a good price for a a decent case, stylus, headphones, screen protector and various power options.
It's £9.99 from Amazon inc del compared while a Market Place seller has it at £14.99 + 4.05 del.
* Extremely robust storage & carrying case
* Four stylus pens for use with DSi & DS lite (two each)
* Screen Protector for DSi or DS lite (three protectors in total)
* Universal car charger for DSi & NDS lite
* USB Charging cable for in-car use or with any USB port
* Three robust protection cases for DS cartridges
* In-Ear earphone buds