I have a greatsword for sale on the CM, been about a week never sold. I went in to check it and it shows 0 swords for sale. Double checked, mine is still listed. Checked the tri listings like mine is and noticed the price dropped down 200mil, just enough now to hide my sword.

How is that possible if something is listed for sale to drop the sale price and hide items, no notification that it happened, nothing.

I just sit here wondering why no one bought it and turns out it's probably because no one can see it.

I get supply and demand but if no one else is selling and bring the price down how is it going on it's own while items are listed?

[showing no greatswords for sale]

[max price changed to 22,500,000,000]

[my item listed at 22,700,000,00]

The price of similar items is grouped together. Others being sold at lower prices for other classes will cause your one to drop as well. 

I guess that makes sense since you could just use a coupon to change the weapon type.