BTAs with a purple foot are not really uncommon. They add about $10 wholesale, so $200 is way overpriced. They may come from Tonga. but they come from everywhere else too.
In addition, when the anemones get relaxed in your tank the color tends to fade a bit. Like someone else said, it should be maybe $20-$25 more than an anemone of similar tentacle color.
Your LFS probably paid about $30 each for them (at least that's what they go for down here), so either they got ripped off, or they are waiting for a sucker.