I ordered one from 3ds-flashcart.com about a week ago and it was $54 back then. However, I found a better place to order, playmods.co.uk which has already shipped my item. 3ds-flashcart.com hasn't even sent my delivery thought I'm trying to cancel it atm. It just seems to be pretty hard because no one is answering there...
So I would avoid 3ds-flashcart.com at the time until they answer to me so I know everything is fine.
I got my 2nd dstwo not all that long ago from modchipcentral. They've always been reliable for me. When I ordered, they contacted me about being out of stock but waiting on a shipment. About 2 weeks later I got mine.
If you're patient, go with modchipcentral
Did you get them around December 12th? Thats when I got mine.. that was the last shipment... Been waiting to get one for my friend ever since...
I trust Modchipcentral.