Hosting a Nether server, and we've scattered some not-so-rare dungeon so that you can get iron, diamond, gold, wood, sprouts, and other resources.
I'll give the IP if you PM me, because we've got some rules for the Beginner Dungeon.
EDIT: Also, we use a semi-rare item as currency, that currency is Lightstone Dust (The glossy, yellow powder in Nether.) Which translates into 1 Riftcoin, which is our currency. It's a sandbox-style RP server somewhat like Pew's.