If you can find and restore items like furniture and appliances, you can make a substantial amount of money. You can acquire the items on Craigslist, or even at garage sales or estate sales, restore them, and then list them for sale on the site. You may also be able to market certain items on eBay, particularly if they are small, unusual, but high in price.
Next, you’ll want to pick a WordPress theme from somewhere like ThemeForest, Elegant Themes or OptimizePress. This is the barebones design of your site, which you can then customize with your own branding, copy, and images. That being said, you don’t want to cheap out. It costs less than $100 to buy a theme that will make your website look professional (and you can upgrade to a completely custom design once you get the business going).