i saw a lot of guys with blue green and even purple weapons and armor. How to get them?

Blue, green, and purple things drop off monsters.

They are tradable if they dropped outside of a dungeon, and autobind inside one.
You have the best chance of getting blue/green/purple equips through the auction house.

Greens are common drops, blue are semi rare, and purple equips are really rare. Though you should know that the stats are random for those, so chances are stuff won't have the stats you want.

http://www.aeriagames.com/wiki/index.php?title=Auction_House&game=edeneternal
This has keywords you can use to search the auction house for equips that have stats that you want.

Also, the higher up in level you go, the easier it is to find green and blue items. Purples are still quite rare.

Some other neat facts... orange weapons/armor don't have durability, so they never have to be repaired. The downside is they're a bit less powerful than say a blue or green item of the same level. But still, in the case of armor, orange is worth it. And you can MAKE orange armor. It's something you learn about later on in Aven. =)

When you hit lvl50, you can do trials and find YELLOW items... which are really good but really really rare. They only drop in trials.

Item type and how to get them
-----------------------------------


White -trash gears. No bonus stats and low def/attack
Green - one bonus stat, below average def/attack
blue - two bonus stats , above average def/attack
purple - two bonus stats, VERY high def/attack, very low durability

All these can be obtained from mob/boss/rare mobs. Blue items are common quest rewards later on.

All of these, with the exception of quest rewards, and blues named after a dgn boss have random stats.

Orange - Crafed items. Good def/attack, teo bonus stats, and one proc(effect activated by an action, % chance of occurring). Indesructable(has no durability) Can also be bought from aven fame merchants and dropped in legion boss boxes.

Golden - Drops from trials, crafted from blueprints dropped in trials. V.High att/def. 2 bonus stats, one proc. Can also be crafted from BP from arena NPCs. Roger can drop golden katana or greatsword when killed in aven.

Awakened - Obtained through a book quest from npc in ave. Lots of hard work to get. Highest def/attack, two bonus stats, two procs. Currently only lvl 65 weaponsa re available, although lvl 70 armours are rumoured to be coming soon.