pilipinasmalakas, you're not the adventurers. You're the shopkeepers and the dungeon makers. So you're not buying the items, you're selling the items, so you get money.
Anyone willing to give advice on the last two maps--The New Throne and Captured Shipyard? Please "shout" on my profile page. I'll leave them there so others can read them.
 "Arkandian Revenant"){kind=icon}
 "Orbital Onslaught"){kind=icon}
 "Dungeon Developer"){kind=icon}
 "Take Something Literally"){kind=icon}
 "Don't Look Back"){kind=icon}
 "270: White House Tower Defense"){kind=icon}
 "Protector: Reclaiming the Throne"){kind=icon}
 "Vector TD"){kind=icon}