So I decided this one has to go...
This pot is about 25 years old, it was in the possession of my teacher before, so I trust his information. The fb early pot group did not yield a clear result on the exact provenance. It seems to be one of the Xiao ming jia, the range of pots done by the better artisans in Yixing with better workmanship.
According to him it is Guihuasha clay, which seems to be a blend of some sorts, see also the topic I opened about this pot a while ago. Also more pictures in there: viewtopic.php?f=19&t=459
That clay is very porous with a good heat retention. Walls are medium-thin and the pot is very light at 200ml volume. Pour and handling is very good. Nice big opening for easy access.
It has been thoroughly cleaned with Sodium percarbonate since then, so the interior is spotless and as new now. Will snap some shots later of the inside.
Probably a good candidate for some Puerh or heavily roasted teas. It is too large for my drinking habits and not a good fit for the teas I normally drink so I am parting ways with it.
Price is 160 USD, plus shipping from Taiwan.
PM me, if interested...
Vintage Yixing FS
Some pictures after the deep cleaning à la Victoria. Good as new as you can see 

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Nice lines, good pot, perfecto cleaning too
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Just wrote you a PM, can you receive and reply to those already?
Read your introduction, that pot might be a good match for the Sheng’s that you like to drink!