You may have stumbled on that something. If you think they really have the product somewhere, or might carry it soon, email them. Many stores are set up to call their wholesalers to see if a product is available. They should get back to you within 24 hours with the news that they can supply it, if they can. Otherwise, you should get a letter thanking you warmly for your interest and support, and admitting sheepishly that they don't carry the product.
Product descriptions vary enormously from store to store.
Sometimes you get no more than the product name, their code number, and the price. They give you tables comparing products. Unfortunately, you have to pay for some articles, but particularly if you're going to pay big bucks for a product, their fee is probably worth paying, to be sure you get what you really need. The lightest virtual stores accept orders electronically, relay those orders electronically to a supplier, and the supplier ships the products out, for a small fee. A few stores charge you exactly what they pay, making not even one used dime on each transaction, because they hope to sell advertising on their sites, on the theory that extremely low prices will bring people through, exposing them to the banner ads as they buy other products.