All items r90+ are 5,000np.
Have 5000 on copy and paste.
Keep refreshing (By clicking the shop keeper icon) until the shop is sold out, Keep clicking the shop keeper until it stocks, Then search for a 5,000np item, By staying in the shop for the restock should give you ti'me to find the 5k item then goto the haggle page, Click where you enter the NP amount, Ctrl + v, Click the little neopet on the haggle I'mage, Then wahey, You have the avatar, If the item sells out, It means you were to slow or your internet is too slow xD
Thanks for reading this and good luck all B)
EDIT by Kitsune - Here are some r90+ items: Apple and Custard Drops, Brussel Sprout Jelly Beans, Caramel and Custard Drops, Charcoal Jelly Beans, Chocolate Peach, Creamy Choccywhip, Dark Chocolate Poogle, Dark Chocolate Shoyru, Dark Chocolate Skeith, Double Chocolate Jelly Beans, ErgyFruit Jelly Beans, Fishy Delight Grarrl Gobstopper, Fluff N Stuff Grarrl Gobstopper, Juppiemint Bar, Kau Sundae, Lemon Sherbert Jelly Beans, Mint Chocolate Blumaroo, Mint Chocolate Chia, Mint Chocolate Kacheek, Mint Chocolate Lupe, Mint Chocolate Peophin, Minty Choccywhip, Bullseyes, Neotruffle, Deluxe Strawberry Toffee Chokato, Omnipotent Onion Grarrl Gobstopper, Orange Chocolate Scorchio, Peophin Chocolate Medallion, Raspberry and Vanilla Nova, Spooky Flying Doughnut, Strawberry Fondant Surprise, Super Spicy Jelly Beans, Sweet Necklace, Ummagine Candy Cane, White Chocolate Nova, Yummy Drops, Hazelnut Whirl.