You commonly pay way more than five dollars for an idea. We pay rights in a lot of thee things that we do and an inventor has the right to charge for their ideas.
I agree with new fish, making his feedback private makes it suspect.
I think that it probably is a good idea, but when you have a good idea you should patent it and keep others from cashing in as much as possible. I can't believe he is making much money by selling and shipping all the materials for $5.00. Market and sell it main stream, you would sell a lot more and protect your idea.
It is only going to take a few people to purchase this and it will be on this forum. Then he will get no credit or he won't sell anything because nobody is curious.
It probably is a coke bottle with bridal veil and a shrimp anyway.