Bukkit

BossShop allows you to create custom "GUI-Shops"

Buy and sell any item with an easy to use clickable GUI.

LimitDrops

ShowCaseStandalone

Pick jobs earn money!

Lets you sell a players heads for half of their money

Adds Lotto, Loans, Stocks

You like to be one like the big ones? With a really nice Animated Scoreboard? Than use this plugin!

This plugin provides in-game auctioning functionality for Vault supported economy based servers.

My personal edit

This is a money economy plugin.

this plugin for: Ranks Prefix, Ranks permissions. Created By

The gMoney is a plugin for economy, use Vault API or No

EconoMy, a plugin for manage your server money

Quest World 2

Item-based currency / economy plugin

Let your players create their own nice-looking shops to sell their stuff to other players!

ServerShop-gui

Official Enjin Minecraft Plugin - Fully syncs your website features (ranks + donation store + modules) and your server together.

Create villager that sell up to 8 items using vault