Its been so long, and I mean a long time.
Not sure what to do here though haha.
I have a few questions as well-
There's a restock forum and there people usually talk about the best things they've restocked. There's also a specific thread to brag about your restocks. You could look through the threads to get an idea what good restocks are. However, there aren't that many restockers here. I usually look up items that only have 1 in stock in the main shops or items I have never seen before, and when I see they're expensive, I still have enough time to buy them. Excluding items which are worth millions and are pretty popular (potions & battle equip). I guess you can learn best through experience. You can also check the SubetaLodge, it has a database for all items. You can sort them for f.e. rariety and user price, but the last one tends to be very inaccurate sometimes.
Well, you are not allowed to refer to other petsites. You can view the rules here, it's the topic 'Do Not Promote Petsites'.
Besides that, you can do quests to earn sP. You can redeem the tokens the Wizard gave you and use them to vend for items. Here's a guide to what which vending machine gives out. This can also give you a little knowledge about the items.
I would just go and get the hang of looking up some the items that you find.. After a while you will get back into it. Hover over the item it usually gives you a hint of what the item is worth when doing a quest. I lost my account and didn't know what things wore worth either at first but after a month I got back into my restocking ways.. Good luck!
I wouldn't refer people off this site to another.