If you're trying to pay off a payday advance, you either need to spend less or bring in more money. Consider selling clothes that aren't worn any longer to bring in the money you need.
Selling used clothes has become a growing business as people look for ways to save money as well as help the environment by recycling clothing. As stores continue to sell their inventory of used clothes, they need to replace it by buying from anyone willing to sell.
When going through your closets, look for clothing that is not worn or torn (unless that is part of the fashion), and especially not stained or smelling badly. You also need to look for clothes that fit the season, as these are more likely to be purchased.
Make sure the clothes are looking their best. Wash and iron them before you take them to the store. Also, call the store ahead of time and ask if you should have the clothes on hangers or if it has any other preferences.
Also, research the stores in your area. Different stores will often have different preferences for styles and labels. A vintage store will want clothes from 20 years ago or more. A modern/contemporary store will want clothes that are currently fashionable.
When you take the clothes to the store, don't bring it in a garbage bag. This will give the buyer a poor impression of the clothes before even seeing them. Bring the clothes on hangers in clear plastic or neatly folded in boxes or reusable shopping bags.
Don't take it personally if the store doesn't want your clothes or offers prices that are much lower than you expected. This isn't a reflection on how the buyer feels about you. It just means the buyer doesn't think the clothes you brought will sell well at this store.
At the same time, be willing to walk away if the buyer doesn't offer what you feel is a fair price. You can always try a different store.
You also might want to consider selling your clothes at a consignment shop, which doesn't buy the clothes from you, but pays you a percentage when the store sells the clothes. A consignment shop could still choose to not sell your clothes, but it may be easier to get a consignment shop to accept the clothes because it is not risking as much as a store that buys clothes.
The nice thing with a consignment arrangement is that you can claim the clothes back if they don't sell. You will just have to negotiate the price the clothes will be priced at and how much of that price you will get when it does sell.
If you can't find a store to accept your clothes, you could always try to sell them directly to customers yourself. You could do this by advertising on Craigslist or Ebay, or you could even try to sell them at a yard sale. Another option would be to try to sell them to friends with similar taste in clothing.
If all else fails, you could take the clothes to a thrift store, which only take donated clothing. This may not help with the payday advance, but you can get a receipt for them and deduct the clothes from your taxes.