Im on the edge to buy a DS lite, Ive found a brand new one for bout £70, is that a good price?? Or could someone even off me a cheaper price. I do have an original gameboy advance we could do some funky swap like i give u the gameboy and £50, i dont know,any offers???

Plus, is it really worth getting, my gameboy is ok, but I would like to upgrade, possibly for new pokemon games, and I found this.

http://www.nowplay.co.uk/acatalog/Gadgets.html

70 quid is good for a DS Lite I believe. As for tradeins, try a high street store. If it's in good condition you could get 10-20 quid for an advance.

The DS is a very nice console, the touch screen is used excellently in many games. As with all Nintendo handhelds, it's backwards compatible, HOWEVER it will only play Advance games, not colour or original (they won't fit in the slot due to a notchy thing). The array of games available is varied and are very fun.

That thing you found would probably be good, possibly for older games and being an (illegal) cheapskate. Or just messing with homebrew.