Tunghori has been selling for years now. If Hasbro wanted to and had reason to, they would've stopped him already.
When looking for figures I've come across many more Far Eastern sellers: Hong Kong, Singapore, they're everywhere! And since I hardly collect anymore, but simply er.... hoard figures for fodder, I'm not picky about what I get. I just spotted a trio of ROC Vipers, starting at $9 or so, less than a couple of hours to go and zero bids! Sure, they come without any accessories and probably have a loose limb or two, but for me as customizer from Europe (i.e. scarcity of figures which are overpriced) deals like that are perfect.
Besides tunghori (SW Army Store), I can also recommend ws_toys, viperskingdom, happyeverydaysales and sinodolls. I even bought two little Lego construction workers for $3 for my girls. Sure, each had a differently coloured left leg, but my girls don't care about that. Neither do I
And you'll most likely only find incomplete figures, but again, these sellers are great for us customizers.