Throughout the Twelve Kingdoms a standardized currency has been in use for over a thousand years.  Each coin type (listed below) has a distinct shape with holes toward the top so they can be threaded onto twine, leather cords or metal wire.  Valuation is standard per DnD rules.

Platinum Dragons (circular; dragon head/dragon head; note that platinum is a bluish-silver color in Aeden)
Gold Sovereigns (hexagonal; Iskandar/12-pointed star)
Electrum Nobles (square with clipped edges; crossed hammer & pick/anvil; note that electrum is a champagne hue with a slight pink tint in Aeden)
Silver Commons (pentagonal; crossed swords/shield)
Copper Vagabonds (triangular "pyramid" with clipped edges; theatrical masks happy/sad)

Assuming a letter of credit isn't being used, expensive transactions or those made in bulk (the kind that are costly but not so much that they require ingots) are made either with gems or with what have become known as electrum, gold or platinum Marks.  These cylinder-shaped 'bars' are worth 50, 100 and 250 gold, respectively, and are called Marks for the Dragonmarked Houses who mint them and stamp them with the mark associated with their House.

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Despite many complaints against the Dragonmarked Houses for undercutting their competition, cornering markets and sometimes holding monopolies, the economy of the Twelve Kingdoms is relatively stable (war and other emergencies notwithstanding) due almost exclusively to the work of the Twelve Houses.  Because of their efforts, there are minimum standards in place for the work of craftsmen.  This means that a sword bought on one end of the Twelve Kingdoms is generally of equal value to one bought on the other end...and the prices will likely be similar.

Master craftsmen, of course, command much higher prices for their wares...as do those who've managed to squeeze out their competition to gain a greater portion of the market (thereby increasing the demand for their particular wares).  However, it is usually the master craftsmen who gain greater market share due to their superior work.  The Twelve Houses are careful to regulate the markets so as to keep trade (and coin) flowing.
This message was last edited by the GM at 05:11, Mon 11 July 2016.