I would say go to this website and make a list/spreadsheet of the ones that interest you.
http://wiki.project1999.com/Category:Shaman_Equipment
Next, because wiki's prices are temporarily gone, you can go here and put in the item name to get an idea of what it's going for.
http://ahungry.com/eqauctions/
Delete any that are way too high. Try to have enough money to where you have your next spell set in the bank. Then, if you have any left. Start buying a piece or two at a time. You won't be able to buy everything at once obviously.
Below are some commonly for sale budget items (almost all under 500pp).
Earrings: Jasper Gold Earring +3 wis = 30-40pp ea., Polished Bone Hoop +10 mana = 10pp ea.
Helm: Crown of leaves +5 wis = 100pp, Nightshade Wreath +5 wis/int 150-250pp
Face: Platinum Ruby Veil +7 wis/str = 350-400pp, Bloodstone Eyepatch AC 4 Agi/Wis +3 100pp
Neck: Glowing Bone Collar +25 mana/hp 400-500pp, Chrysoberyl Talisman AC 5 Wis +3 Mana +20 = 300-400pp, Black Iron Medallion +3 wis/int 30-100pp
Cloak: Mammoth Hide or Molten Cloak +4 wis 1500-2k, Kunzar AC 7 Wis/Int +2 Sv Fire +10 = 150pp
Shoulders: Embroidered Black Cape AC 4 HP +15 Mana +20 400-500pp, Lizardscale Mantle AC 5 Wis/Int +3 = 100pp
Feet: GEBS 5k, Wolf Fur Slippers +20 mana 500pp, Kobald-hide boots AC 5 Agi 3 hp +10 = 75-100pp
Hands: Split Paw Hide Gloves: AC 4 Dex +3 Wis +2 = 20-50pp
Legs: AC 7 HP 15 Wis +4 Gatorscale Leggings 1200-1500pp, Feathered leggings +7 sta 50-75pp, Silversilk Leggings +12 hps 75-100pp
Rings: Platinum Jasper Ring +6 wis = 150=175pp ea., Platinum Skull Ring +30 hp +20 mana 150-250pp ea.
1h Weapon: Sharkbone Warhammer 8/26 +5 wis 100pp, Brell's Kegpopper 15/35 150-200pp
Shield: Charred Guardian Shield AC 10 Wis +9 = 350-400pp
2h weapon: Runewood Great Staff 22/40 100pp
Range: Beetle Stinger +4 wis/dex/agi 150pp
If you go with the lower priced items on the list, you can have a full set of gear for 1200-1500pp.