Strongly agree with Brian—don’t think in terms of investment value or appreciation in price. You may see one of Ishida’s painted pots listed for $700, but you’d be lucky to get half that selling to a dealer. [a lesson I learned long ago with vintage guitars and dobros]
I have seven of Yuki’s pots in my “collection”, and three of Ishida’s unpainted pots. Ishida made glazed but unpainted pots between 1970 and 1974, before she took up an apprenticeship to learn to paint them. This is one of them. Its exterior dimensions are 1.75” in diameter and .75” deep. Of all the pots I own, it’s my favorite, with the possible exception of an 8” Shuho round that’s probably in the vicinity of a hundred years old.
This is one of Yuki’s pots with a shohin satsuki as I was prepping it for our annual exhibition in June.
Two things I’ve learned chasing her pots:
First, on eBay you may see an identical photo shown by three or four sellers in Japan. Each will have slightly different spins on the price—$180 plus $30 shipping, $210 plus free shipping, etc. They’re usually the same seller.
Second, study the photos carefully. There are occasional flaws in the clear over-glaze—drips, bumps, etc.—which don’t bother me too much, but some might find disappointing. And many of the Japanese sellers don’t take returns.