When moving things to my main I always used the shop to move around 500k or so between accounts. Would trades be the safest way to move say 4m? Using baby paint brushes or other items? I know whenever I sell np I do paint brushes, but I have never been on the other side receiving the item before.
Here's an absolutely brilliant, in-depth, transferring guide by Adam :] neopets-cheating-f80/transferring-like-a-pro-t17183.html Hopefully that helps.
What he linked to ^^ I think the best way is always through a shop, either buying expensive items cheap or buying cheap items expensive. It's not the fastest way, but it definitely the safest way, at least from what I've tried.
I think the best way to move np is through shops, because that's how big np selling companies give you your money. Price your items at 50,000 np, 75000 np, or 99999 np to make it quicker.
Well to me the best way is just to buy an ETS item (I prefer BD items) and just send via neofriend, along with a neomail to say something like "Happy Anniversary, from Me." or something like that