I shared an interview here on the blog with Jessica Larew, an Amazon FBA seller who makes six figures just on Amazon (not to mention her other online work). You can check out that interview right here to see how she does it — and how she managed to hire her husband out of his full-time job so they could both spend significantly more time with their son. That, to her, is what having a rich life means, and she found a way to make it happen.
Research selling prices of items similar to yours. Look up completed sales or current listings of items similar to yours. Find the high- and low-end prices, and price your object around the median price level. If you want your item to sell quickly, price it at the low end. The condition of the item also affects the price. Items in poorer condition should be priced at the lower end. Also, consider how many listings there already are of items similar to yours. If many similar items will be competing with yours, you may have to set the price lower to get the sale.
Today, if you're at all serious about succeeding in any endeavor, whether online or offline, you have to deliver enormous amounts of value. Yes, you have to do the most amount of work for the least initial return. This is especially true online. Why? Because it takes time to build authority and create an audience, two primary ingredients necessary to succeed in the wonderful world of commerce on the web.