You see the inflated prices mostly on Cwejman modules. These were made by an ingenious inventor in high quality and small quantities. During his lifetime the modules were already the most sought-after and expensive. Now that Wowa has passed, it is clear that the price is no longer determined only by the functionality of the module. They are considered as a legacy, as pieces of art.
Sure some people want to cash in but if you think about it this way it is very relative: what is the price of any Banksy certified reproduction print.