Buy/Sell/Trade - Seeking an XCarve Pro 4x4?

Hi all. I have had an Xcarve for a few years and don’t use it much as I wanted to do more 3D kinds of things like signs, etc. It does NOT do that sort of thing well or at all in my limited experience. I"m thinking I might need/want an Xcarve Pro 4x4. Can anyone tell me the right USED value of these? I saw a couple years ago the Pro was over $10,000 and not it’s on Amazon at all now. I see it’s about $6K…what a big delta !!! Why is it so much less now than 3j-4 years ago and will it keep losing value and price in the next 1-2 years?

Also I will sell the Xcarve…what is a slightly used 3-4 year old Xcarve worth nowadays as a tradein or standalone used unit sale?

Tks