You can buy clothes and items from other users in the online game

There's a charity sub forum where altruistic users raise funds for those who just joined cheap luminary gold and have no good clothes and shoes.

With the gold, you can buy clothes and items, which go into your inventory and can be equipped on your avvy. Gaia has a wide range of clothes and items that you can get your grimy paws on, and it'll probably be safe to say that you can create an avvy that is unique.

You can also buy clothes and items from other users. There is a forum called the Exchange (okay, technically, it's considered a sub forum, but okay...), where users sell clothes and items through postings. Some of them ask for a particular asking price, some hold auctions, and some do a combination of both (auction with a reserve price or a buy-it-now price).

Users usually go this route if they want a particular item (or items or combination of items and gold) in exchange for the item that they have. If you and the seller agree to a trade, the two of you do the trade through the bank.

There's also the marketplace. This is sort of like eBay, where you can bid on and/or buy particular clothes and items from other users just by clicking a button. I personally prefer this over the Exchange, because it's faster.