I guess it depends on what class you are, if you're a fighter, pots will probably be more useful for personal use.... but if its solely for vending... Stone mats will be more readily available (and i dont recommend enhancing, so stones should never been used for urself but for others to break their weapons with XD)
I think this link might help you Tadiakichi
http://www.fiestafan.com/forums/showthread.php?t=793
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