Sure as long as you want to not talk about piracy. Personally I have several DS flash cartridges and most recently got a R4i 3DS Gold + in part to mod a bunch of 3DSes but also to replace my DSTwo which causes an excess of battery use.
Also wanted to note that I recently bought about 1/3 of the games I posted in the OT as well as got a 2nd DSi XL/LL from an Amazon 3rd party seller with my yellow DSi XL:
