When the greens were incorporated, many people were frustrated that "perfect" items were being dropped and that their gold items would go down in value. All of a sudden people had access to superior equipment and it cost less than one of the mods on the green item probably cost (except in the beginning when everything was REALLY high). But, people learned to live with it and got over it. Then the Tombs green items came. It went for outrageous amounts because many people (me included) thought it would revert back to the place to enter the Hall of Heroes. And the fact that it was new

Next, the infamous HoD items. The sword, which has the most fame by far, offers +5 Energy. Many people hate on this sword, like many of my friends have. Then, the one day they could afford one and bought one, they were like "OMGZ THIS THING ROKS HARD". They really changed their tune. I think A LOT of the people who hate this sword either don't own one or have one and just like to hate things

Personally, I own 2 HoD swords and 2 HoD axes. I got one for my W/Mo who was coming through Denravi. I crafted 2 of each and saved one for my other W/Me (little did I know that after ascension I could change my secondary whenever I wanted and keep all my primary skills, lol). So I was going to build another warrior and give those items to him. By the time I got my W/Mo to the Southern Shiverpeaks, the HoD items crafter had forked over all his awesome items to ANet. I eventually gave the axes away to two close friends of mine who really wanted it. Who knew how desirable they would be?
The thing is, I never really realized what was so great about HoD axe. Again, it's people wanting perfection. How much HP is max? How much can you make it? Why do people pay like 400k for +2 energy? Why do people pay 1 Mil (axes are rarer, probably less crafted possibly) for 25 more health? They'll still die a second later under heavy degeneration. If people want perfection, let them have it.
Final issue is about people being conservative with their money. They always use collectors items and Droknar's Armor. Whatever it's still good, mostly asthetics. But they say they only spend 10k max on an item. Why? Because they think it will just be overwritten with new Factions items and upgrades (*looks at -5 (20%) shield). People are scared and pissed (people w/ -3 (10% chance shields) that their item's value will drop tenfold green items style. The thing is, if you are always so afraid, when will you not be? For all we know people buying +60 Hex shields will be pissed when ANet releases +75 Hex Shields to balance the game.
Personally, I paid A LOT for my Magmas Shield and A LOT for my Crystalline. Partially, I want to see what is in store for factions. But am I worried that my Magmas and Crystalline will fall in value? No, not really. It's part of life, something better is always being made. And, inevitably, when I enter Factions, someone will say "OMGZ NOOBZ ALERT, LOOK AT THAT GUY WITH CRYSTALLINE AND MAGMAS!!!!" "Look, I got a DeathBlade and Storm Shield!" Obviously, new items will come out to replace my items, but then I will just buy those items. For people who only spend 10k max on ANY item, don't be afraid to buy just because it will go down in value. It would be like if you never bought a new graphics card because you always thought a newer one would come out. Everything will go down in value eventually with various updates and new content (except for HoD items, but maybe ANet will add a +5 energy knife or +25 health kai for assasins, who knows

EDIT: Oh, by the way, please voice your opinions too, but NO flames please. Everyone is entitled to their opinion and I will listen if it is reasonable and the post doesn't start with "OMGZ U NOOB U SUK LIL NOOBLET"
EDIT #2: Re-read and realized I did sound like a braggart or something so I edited it. But if you think I'm bad you should meet *coughcoughUcoughBcoughEcoughRcoughMcoughAcoughNco ughCcoughEcoughR* That guy just CAN'T STOP bragging about what he buys and how much he spends a day...