I used to transfer mine via shop method + proxies
but recently got chain freeze so that tells you there is nothing 'safe'
when you are cheating xD
good luck though
Thats what I would do, similar to what was mentioned above.
Using A Proxy - If you have 100k on a shell, go into trading post/ shop wizard and purchase an Easy-To-Sell item at 100k.
Then, place it in your shell account shop at 1np, dont hit update shop yet!
With No Proxy - Log into your main, and buy the 1np item. Just be quick about it, and you will be fine. Now that you have that item on your main account, you can just sell it, gaining the Neopoints right back!
I do this often. Personally, I open both browsers, Internet Explorer w/ no proxy, and Firefox w/ proxy, and I just click back and forth. Too easy.
But... as Cracker said (above), nothing is perfect. Those terds at TNT, or whoever, they freeze people who do not cheat.
I use proxies and trading post most of the time, and tend not to trade more then 150k at a time to my main. Unless I got a feeling I'll get frozen, then I go for the trading max of 800k at a time to my main and if I'm not comfortable with it, trade it on from there.
I log in with my main or temp main I use atm and make a trade ready with any worthless item basicly, then I log out and clear my cookies. Then open up hotspot shield to change my ip and just to be sure clear cookies again, go to neopets, log in on the account with the np and make an offer on the trade I have ready. Probably not the very safest way, but for me it worked so far. Tho I'm pretty new tho SS-ing so I haven't been doing it long enough to promise you how safe it is. But as others said before, you have to be prepared to lose things. First time losing my main sucked, now I'm prepared for it and don't get expensive things I want untill I'm pretty sure of my methods working
I'm either gonna use trading post or just buy simple things like codestones, PBs, etc and get on a shell w/ IP and send "Happy Holidays!" or something.
There's nothing more that I could have asked for � except for it to last forever,
I always prefer buying one medium-high item than a bunch of codestones .
I've been frozen through shop, but not too often compared to gifting/trading post :3.
100k is a very small amount compared to what some people transfer daily. You would be fine transferring through a shop and clearing sales history or going through the TP.