CAPITALISM, HO!
In Recettear, you run your very own item store where you sell items you either buy from others or looted from dungeons, haggle and sell the items higher than their base value. At times, some people will sell stuff to you. Then you can go lower than the base value and then, resell the item afterwards if you don't need it.
TL:DR: Store Management in japanese manga style! :3
This game is great! And for a otaku like me it's even more awesome. Been looking for a JRPG ^^
Try out the free demo on steam at:
http://store.steampowered.com/app/70400/