3 people are needed for a skin:

The character artist, the person for the voice line attached to this spesific skin and the game programmer to implement this specific skin into the game.

With Maya software, a lazy character artist needs 4-8 weeks for the design. Let's say that the game programmer needs the same time to implement this skin creation into the game. So in total 16 weeks are needed for the skin. Let's say the person who sells the voice line needs 1 day to be recorded. Since that person might be an unknown actor in a small theatre, lets say that he/she wants the payment multiplied by 5. So, this person will get paid the same amount that the character artist receives per week.

In total, the artist gets paid for 8 weeks, the game programmer for another 8 weeks and the actor for 1 week.

The sum of this is 17 weeks, i.e. 680 man-hours. Lets say they receive 20$ per hour, this means that the skin costs $13600 to the publisher. Since I said I am generous, I will allocate 36400$ profit to the publisher for having the incredible (sic) idea of selling a new skin, so I think the fair price of the skin is $50000.

So, they should ask 50.000$ from the community, not even a cent more.

Now, since the total copies sold according to wiki are more than 60.000.000 (but lets say they are 60 millions exactly), with a simple division, the result is that each account owes 0.00083 dollars to Acti-Bliz to get the skin. Not even a cent more.

I won't buy any skin more expensive than that.