None of them are worth much, but giving you prices is not possible as they vary worldwide and we don’t know where you are. We also don’t know what exact condition your equipment is in, nor whether it’s all in the original boxes with the original documentation and instructions.
But you will get the maximum return if you split and list every item separately. That means selling controllers, consoles, cables, accessories and games totally separately.
You can get a good idea of the kinds of prices the items might fetch by searching on ebay using the “sold items” filter. That tells you what they sold for: the original asking prices are no guide at all.
Prices will be low because there are loads for sale right before Christmas as people try to raise cash. They are also low because almost everyone who wanted a Wii has by now had one, and because the Wii U was an unpopular flop. The 3DS is more likely to get a better price simply because it’s a self-contained system and is highly portable.