Use Etsy.com It's a great site that people from all over the globe use to sell their handmade/refurbished items. You can get a fair price for your merchandise if you ask for it. The users all have a really good eye for quality!
however much it costs to make one plus some for profit, maybe 5 bucks each, if i made them of steel, and if silver, then i'd actually have to do math lol. we'll see, i haven't decided yet also, if i color the creeper, i am starting to airbrush them
yeah, in the final version i'll be putting all the mobs faces around the edge, and the creeper face will be the biggest, whilst on the opposite side of the creeper face, i'll have a pickaxe/sword cross thing so you can wear it either way