Buy exploitable O3ds/2ds or sky3ds+ ?

I already have a 9.9 original 3ds, should I keep it and go for a sky3ds+, or buy a 2ds from Amazon/local super market or a second hand o3ds/o3dsXl with exploitable firmware from e-bay, set-up rxtools, system tranfer the original one to the emunand of the new one and then sell the old one?

What is the cheaper option? Which one gives me more options? I don't want to spend more than 120euros whatever option I choose.