In my own experience, healing potions are so useful that I wouldn't be inclined to sell the healing tonics for 200 gp. But to prevent some people power-looting it, I'll lower the value of the tonics.
Actually while this is true, most folks usually use their own potion supplier to get the mentioned healing potions.
ML tonics are not that good in a fight, and it is not hard to make yourself some CLW pots.
The money you would get from selling ML tonics, you can spend easily on buying herbs.
(5 morninglordian potions sold = 1 box of herbs. 25 knuckles = 35 skeleton knuckles. Just time factor is greatly different.)
Also if i can, i would suggest the mages tower potion rewards to get their price reduced as well, and the vistani handed out potions that are made from drobita and another fungus i forgot its name.(both can be found in the scarab holes, and from both the vistani girl makes potions.)
Basicly i think all reward potions should have their price lowered.
Also one question about this:
Untill the modifications are implemented, is this now considered an exploit? Or is it allowed to be used.
//I do not use this method, but it would be good to know what the current stance on it is. Is it allowed to be used, or is it not. Since many folks do not read forum, and thus would not know about what the current stance on it is.//