manufacturing cost of most items is only a tiny fraction of the retail price, yes that could partly be price gouging, but it also includes all the costs for marketing, shipping, packaging, DOA returns, the people that actually design and build the thing which I bet is also not included in his costs, taxes, insurance and of course profit margin. you will find many items that sell at not just 500% but literally 1000% increase of the raw manufacturing cost and often that only includes a relatively small profit margin