Hot answers tagged pick-a-brick
Short Answer: Yes, you could buy minifig heads at a lego store. Caveats: The heads are part of the "build-a-mini" feature of the lego store. So while you could technically just pick 1 head, you would still be charged for the whole set ($9.99 in USA, I believe). So you may as well pick whole minifigs + 1 accessory + hair/hat. Variety of head, torso, legs and ...
There is the Build-A-Mini station where you can build three minifigs (plus one accessory each) for $9.99. That said, some stores will let you buy 15 minifig heads and be done with it. On the other hand, when our local store recently had the ghost pieces, they restricted us to 3 of those per pack of 3 figs.
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