It has no effect for a single person, yes. But as soon as you import stuff to sell it (or even give it away!!), you are a manufacturer (at least according to german law). That means, you are bound to the WEEE regulations and have to follow them. The penalties for not doing so are quite severe, I wouldn't recommend trying.
If you are outside europe and sell your stuff to persons in the EU -> no problem.
If you are within europe and sell your stuff to persons in the EU -> WEEE hits you in the face.
As I said, I don't know the rules in other countrys. Allow me to use german laws as an example (all figures for less than 1000kg products sold/year, if more, it will cost you way more):
Selling, renting, gifting (!) of any electrical product that falls under WEEE regulations (doesn't matter if imported or your own product) is prohibited if you do not:
- register your product with the "Stiftung EAR".
- tell them how many kg of electronics you sold/gave away (every month!)
- recycle containers full of electrical waste based on a lottery system (of course, you pay for all costs! Usually, thats about 1000-1400€)
You have to register every single product type you sell. Depending on product type and other things, a registration costs about 300€ once and then 220€/year.
There are companies that offer some kind of insurace against all this. You pay them a yearly fee and they take care of all that stuff for you (recycling included). But even so, this can be as high as 500€/year - for one product. If you sell two different products, well, you have to do all this for EVERY product type you sell.
If other countrys have similar laws... you would be better off avoiding this WEEE stuff where you can!
The only loophole I know of is to sell components, not products. If everything you sell is just a component, they can't touch you. But as soon as you sell anything that has a function on its own, its over.
Of course, CE is another thing entirely - don't get me started on that.
However, all this stuff only applies to sellers, not buyers. As long as it is for personal use, you are fine. But importing electronics without CE conformity can cause issues with customs - at least in Germany.
Edit: ignoring WEEE and CE may work out, but if you are found out, you better have good lawyers and a LOT of money. Ignoring WEEE can cost you 100 000€ and more in Germany. In any case, that would be the end of any small business. CE does not mean you have to get your device tested, it only means you have to be sure it would pass the tests and state that in an official document. Of course, your competitors could test you product - if it fails... well, same as above. You are in deep shit. Same thing with WEEE, any competitor could sue you. Sadly, thats common practice today.
Phil