You currently nab the Limited Edition Nintendo DSi Pokemon White bundle for under £60 over on the IWOOT outlet page on eBay right now, which includes the limited edition Pokemon White DSi console, and a copy of the game.
We've got a soft spot for Pokemon Black and White, and you can click here to read Jon's review of Pokemon Black. To be honest, the game itself might not be the best entry point into the series, but as a starter bundle, you can't get much better than this. Plus the DS library of games is enormous!
Also, Infinite Space. Just saying.