Objects dissapear so fast that you don't have time to think what is worth and what not, and it can restock ANY R99 item, so you can't just memorize them.
You need to have an outstanding luck, intuition, skill and experience on neopets in orther to legitly rs there and have success.
Yeah for real, I've gotten 5 items a day from there, I only go for items that stock with 1 and look expensive, and my BEST restock there was Iron Lupe Sword . It's tough.