Carvin is closing. They are doing what they can to maximize the $$ selling their remaining inventory. Don't expect things to be predictable during this period.
Honestly, if you know that a manufacturer is closing their doors, why would you consider purchasing anything from them? There will be NO post sales support if the company is closed down. Unless you can get product at throw away prices, it's hard to justify spending money with them.
I'd only purchase something like hardware or cases from a company closing down. The iem unit I purchased was days before the closing announcement was made so my timing was bad. I hope it lasts....
Regarding the pricing - It's just a bit weird. The prices went down to 20% off when the announcement was made, then went to 15%, then 10%, now they are all over the shop.