It appears that the filters for these (or at least the black one) are no longer sold?
They do seem to be OOS everywhere. But it looks like there are a lot of “compatible” ones around. Depends on whether you trust the generic ones.
Is the only difference between the two the color and the filter?
Bought the purple one a while back - it is LOUD
I decided to purchase the black one. According to the specs it is supposed to work in larger areas than the purple one. Also, the price on the mothership is about twice the woot! price. I also ordered a set of replacement filters (not name brand) from amazon; there seems to be a number of choices there.
Edit: arrived today (10/13). Easy setup and is pretty quiet in the low and medium settings. Has a nightlight, too. Would be nicer if it also had a timer, as I’m likely to forget to go turn it off.
Also, the refill filters I bought from amazon arrived 3 days ago. So there was fast shipping on that order, too.