If they charge enough and sell just 1 that might be all they need for easy money and a big profit. Some might call it a scam. But It’s attempted here all the time (sell something for absolute top dollar that can be finagled). It’s something agon is designed to do ie facilitate sales of one-off hyped up items only here on the “high end” site….the Ultimate hifi boutique shop. Complete with free forum for marketing efforts. See the occasional ad for a 10k power cord from a total unknown, for example. High end means more expensive and elaborate. Things few others are likely to own or want. Duh! Get a clue hombre! All else is subjective. So nope, no price is too high. The sky is the limit. All you may need is a buyer. So just factor in expense of hiring a few good shills perhaps. You know, the usual story just with expensive hifi things. Have at it!
Then you have the reputable vendors who have to be concerned about maintaining a good reputation. Different story !