Following general guidance of what I could source:
Qing/ROC
I am most comfortable sourcing antiques from the Late Qing, early Republican era. Earlier is more difficult to identify, stakes are too high and lots of disagreements even among collectors, so I avoid those. I also would not venture into the premium high value sector, as again the stakes are too high. Think for example high quality Zhuni, ornamented pots and such.
Commoner and mid-level pots are all good to go. Price will depend a lot on state of the object, style, clay, firing, workmanship. On average the price range will be in between the 600-1000$ range. This is for pots with average workmanship and might include imperfections as chips small and larger, repairs etc. Perfect condition is rare and of course would increase the price quite a bit. Zhuni is of course premium and to be honest, if I find some, I will most likely keep them...
F1
Early Factory, although those are hard fought for around here and prices can be unreasonably high, compared to older ones.
Later F1 I could source as well, depends a bit on the particular model, case by case basis.
Price really depends on the exact style, clay and vintage. Prices will be similar as to what others offer.
I am not interested too much in Xiaomingjia or ornamented pots, so I am less inclined and confident to source them...
Chaozhou
The occasional vintage or antique CZ teapots cross my way from time to time. Recommended for anyone into Dancong teas and other roasted oolongs.
All this is hypothesis, it would take time and effort to hunt those down, unless it is happenstance
