I work at a Dollar Tree and last friday we got a case from our warehouse that stood out to me. On the case it was kinda small but it was from McFarlane. So I opened it up and turned out to be Halo Avatar figures they are small but the heads are Star Wars/ G.I. Joe size. And you could even use the canisters in dioramas (Sprywalker)...Best of all the price is only a dollar.
Biker scout for size reference.