Why all these JC-1's for sale?

I don't doubt that this is a very good product and an extraordinary value, but i'm curious to understand why in the space of 1 month or so i have seen seven pairs of these jc-1's for sale here at audiogon. Could it be that these people purchased them at a discount and are selling now for a profit or is there something regarding their performance that is amiss? Could it be a coincidence? I am not familiar with these amps but have read about them. As always this forum is an opportunity for all to better understand important products that come into our passionate hobbie. Please, fire away!