Scaling coins.

Originally I had planned on using the pricing for items from Retro clones to make dundred compatible with old adventures, but an idea struck me that may be too nifty to ignore.

If 10 copper pieces bought you 1 silver, and 10 silver bought 1 gold, a 10 gold bought you a Platinum piece, you get a nice effect for pricing items by quality.

C= crappy
S= standard
G= good
P=premium

Note the first letter is the same as the coin- Copper buys crappy, silver buys standard, gold is good, platinum is premium.

If I price items in generic coins, the type of coin you spend gets you a different quality item.
Say a hand weapon costs 50 coins.
50cp gets you a crappy sword +5
500cp (50sp) gets you a standard sword +10 to hit.
5,000cp (50gp) gets you a good sword +20 to hit.
50,000cp (50pp) gets you a premium one. +30 to hit.

This scale is more in my imagining of a fantasy middle ages too- where folk would have only a few, big clumsily minted coins (and probably a rusk of stale bread) in a pouch.

A single copper can buy your adventurer a crappy drink at the crappy tavern. Three coins and you have a meal. 12 and you have a days provisions (3 drink, 3 food).
The 10x10x10x10 means as treasure accumulates tenfold, players could have upgraded all their starting items one quality level.
Quick, easy and only 1 price list governing 4 standards, and having a built in advancement curve.
Plus, just write everything down in cp, and the digits will tell you how many gold, silver and platinum you have....
2314c is 2plat, 3gold, 1silver and fourpence.
PGSC
2314
Easy.