I don't know what to charge for it but I think it is awesome.
That cake is gorgeous! It looks so real! I have no idea either but if it were me, I'd start by working out the cost of my materials, then work out how much time it took (since you have already made this you'd have a good idea) and multiply that by an hourly rate that you're happy with. Add the 2 figures together and maybe give yourself an allowance for if things go wrong. Like I said, I have no idea - I don't sell cakes either but that seems a good starting place to me. I'm interested in how people price their cakes too!
For my 3-D cakes I start at $150 regardless of whether they want 10 servings or 25. After that it goes up $4-5 a serving depending on how complicated it is.
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