If you can afford it and really want a 2nd unit, I'd consider the 3DS XL. It's very nice and much easier on the eyes. It depends upon your age and eyes, but it helps mine. I'd also keep your original. Yep, trading between your towns is very nice and you'd always have a "back-up" if one of your units breaks or gets lost or stolen.
If you have siblings or others who may like to use your 3DS it's nice to have one that you don't worry quite as much over as you will have a newer one "just in case."
I have nephews and my older one got (and gets) dropped and abused like you wouldn't believe. So far it's fine, but I never let them touch my 3DS XL! Also, tho, all my ACNL games are physical so no town gets harmed or broken.
If money is a hardship for you, then reconsider just sticking with the one you have, or if the trade-in value is good, then go on and get a newer or upgraded version.
I prefer to keep my older one as it is in good condition (so far) and I feel more secure having one to play on to trade between towns and as the back-up in case a nephew accidentally does something to it.
- - - Post Merge - - -
why would i want to trade mine in?
I wouldn't, unless the cost is so prohibitive that the few bucks you may make is worth it. But it depends upon the value you'd get. All the shops my hubby and I have been to give you next to nothing, so it would not be worth it to trade it in at all.