This highly varies, it basically depends on how many vendors are offering them for which prices. And sure you CAN sell potions for prices people are ‘willing’ to pay, but I never been too dependent on that, rather keeping my stuff if prices for it drop too much, because I calculate them from efforts/dram/game-time spent for the produce.
If I am spending an hour to farm and craft for something, I wouldn’t throw it away for less than around 2k, for example, rather more - because this is the amount I could easily farm spending that time to kill mobs instead of watching my cauldron or fishing…
I don’t really understand some of the market prices, imho the most expensive potions should be those which need to be crafted 1 by 1 (with no 5x, 10x recipes available). Even if mats might be cheaper, the time spent to craft these is much higher and even with netflix it’s pretty boring waiting for those colors to turn x times.
As for the finely aged potions, I didn’t sell any for a longer time and then only around 5 during the last month (setting the lowest market price, along with another stall). They are needed for only a fraction of expert fights or records and players doing those likely also care for their potions themselves. The time to age them is awfully long, reborn will be almost there when the next batch is done and since they are useless then, it’s risky to do stocks.