A prime example is nostr:nprofile1qqs2zqnq524z7zfdsh3vpwpwjh4vt7xxp6sec68y3xr3ndvve23ru0spzamhxue69uhhyetvv9ujuurjd9kkzmpwdejhgtcpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhszynhwden5te0dehhxarjw4jjucm0d5hsgheky9. Bullish lists all products based on the Sat value that Bullish is willing to part with the products. https://thebullish.shop/products
You don't use the product to value Bitcoin, you use Bitcoin to value the product.