This is a rock with leather wrapped around it. Don't ask me what it's for. I don't know how you're going to use it. I think it's useless. I'll never make another one, so it has that going for it.
Leather - $10
Time - maybe $50...who cares? You're not buying this. I don't even know why you're looking at it.
Usefulness - $0
Uselessness - Priceless, but let's say $5,000.
Shipping - $0 (You're welcome)
Insurance - $46.90 ( Yes, I looked it up)
Total - $5,106.90 Seems reasonable.