How much should I price these? (With face and no-face)

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How much should I price these? I created a shop for them and only priced them at a dollar. (http://www.mc-market.org/threads/134117/) I've been getting various different amounts of the price I should put on these, but I want to make sure I neither over-price them or under-price them. Also, if I added details on the face, what price should I sell that at?

(made this one for Titanic )

So, how much should I sell for the ones with the details and without?

 

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hehe

i felt very uncomfortable staring at the picture the whole time drawing it.

 

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How long does it take you to make one on average? they're very stylish and simplistic!

Around 20-40 mins. Depends on how much detail.

 

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$2.00

A few dollars, 2 or 3 possibly, I think 1$ would take too long for little return.

thank you!

 

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$3 so nice.

thanks!