left click the item. then click the broker button at the bottom of the inventory. u can input a price, I would advise selling around the lowest price, but if the item is more so expensive to naturally sell then it is for them, the most the average price, then id advice right clicking and selling. especially if its higher then the highest price

Thank you so much for this guide! I'm a new player and your guide helped me get a better handle on how the game works. I especially like the tip about retreating during quests that don't require killing things as I probably would never have thought of that on my own, and I'm looking forward to doing missions.

Yeah doing missions has helped me so much. Once I figured you get potions half the time, the missions became a large part of my time and I've made mission-specific pets (I've spent SO MUCH GOLD on potions X_X So I am in love with missions XD). XD Not to mention the gold you get, especially if your pet performs exceptionally well. I've even sent parts of my main team out when I'm too lazy to battle to get them exp.

Quick question about the broker: How do you withdraw money from your till? I can't seem to figure out how.

@Brairtrainer,
There're 4 tabs (Browse Broker, Your Listings, Broker Till and Transaction Log)
You click on Broker Till tab and you can collect your money.

How do you set up a "pet trade" if you will with another player, where only they'll be able to buy that pet?

Go to the pet you wanna trade to the other player, Manage Pet, and set the pet for sale to the User ID of the person you wanna trade with. You can find the person's ID on their profile. c:

Usually, when it's a guaranteed trade and all terms are good, the pet is set up for 1g. So long as the user ID is correct, it's safe and only the other user with that ID can pick up that pet.

But what if the user ID is too long?

Edit: There are 11 characters in total, but the space where (from what I understand) you have to put the player's ID (in that slot that says "Sell to User ID") stops at 9 characters.... (What can I do???)

It's not a username, it's a number.

For example, mine is 1127.
Yours is 13605.

When you go to the profile, it's the set of numbers At the end of the URL.

Oh!!!! Thank you so much!