Worlds 1 through 7 are often refered to as 'trade worlds'. If you venture to Varrok, there you can find something called the Grand Exchange (GE). That is where most people gather to trade, buy, or sell items.
Or, you may use the GE to buy your items. Talk to the GE tutor near the south entrance to learn how to use it. Basicly, you offer to buy an item. Then the GE looks to see if anyone is selling that item in it. If your offer is equil or greater then the offer they are selling for, it gives you the items and gives them the money.
The most effective way would be to offer the maximum value for the items you want. Then the GE will give you the best deal, plus the difference back. Say, you put in an offer for a Addy platebody at 3.5k and someone is selling one in the GE for 3.2k. The GE will give you the Addy pl8 as well as 300 gp back.
All adamant armour like Adamant full helm, Adamant platebody, Adamant plateleg
Grand Exchange
there is not another place you can buy a addy halberd besides the ge
Please use the Runescape forums for things like these, that is what they are there for.
There's Magic Long Bow's, good exp and only buy for med, trust me, it will buy. sooner or later. And another, is Maple Long Bow's (u), If you got good money, or really want to get your mage up, do Adamant Plate Bodies. Buy for Med only.
The easiest way to get it is to buy it from the Grand Exchange. There is also a plateleg shop from which you can buy it, but it's actually more expensive there. Yet another way to get adamant platelegs is to smith them yourself, from adamant bars - but this, too, is more expensive (due to the price of the bars) than actually buying the platelegs on the Grand Exchange.
Realistically, you have 3 choices; 1) Buy it from the Scimitar shop in Al Kharid 2) Get it as a drop from an NPC that drops it 3) Buy it from the Grand Exchange
you can either go to the grand exchange near varrock or enchant them from buying regular diamond bolts which are from adamant bolts
Answer: The grandexchange in varock. That's the only non combat, and non smithing way. Answer: You can buy one at the Grand Exchange; make one yourself; or buy one at the kiteshield shop.
world 2 is the best world to buy everythings
The gauntlet are just like gloves only more expensive but they give more defense bonus Warning Only buy gauntlets if you have enough money
It is against the rules to buy runescape accounts, but there are black-markets, and the prices depends on how good the account is.