The reason why things in real life devalue over time is because, unlike in a video game, things in real life deteriorate and go bad and break over time. In a video game, you don't get that same deterioration, things stay the same quality no matter what you do. That's the sole reason why you see items in life devalue, no other reasons exist.
To say that items in this game devalue based on just basically owning the items in generally would mean you'd have to exponentially devalue really valuable items just based off of ownership alone. For example, if you trade around a DF to 3 other people, that DF's value is drastically reduced. Suddenly that DF goes from being worth 600 DTS to being worth only 100. Or, to be more fair, judging based off of your consistent devalue that you have of 40%, it's more along the lines of 77.76 DTS (if my high school level math is right) If you're wondering how I got that, you have to devalue the item by 40% every single time for each ownership. That's 4 people it is devalued 40% by. That's not even including the other forms of the items supposedly being able to be devalued by.
The only way for any item to have devalue numbers is if EVERY ITEM has them, but clearly nobody is going to be selling a STA for 20 DTS now are they? Therefore, there's no such thing as item devalue numbers based off of ownership or any factors this game has. An 80 hit DF is an 80 hit DF no matter who owned it or how many, therefore it's still worth a ton.
I think we get it Tru, you wanted an ego boost so you made a niche little price check thread where only you can give out "accurate" price checks on items that you think should be priced a certain way, we get it tru, we do; but it's getting to the point where you're just plain wrong a lot of the time. The Ultima Official Price Check thread is as Saith said, still active and open to suggestions. If you feel like you need to make a suggestion on prices, it can be and should be negotiated there, in that thread. This thread, well, is kind of pointless to the community and only serves to boost your ego.
I think you're a great player tru, but even you have to admit this is getting a little ridiculous.