"How do i use eBay" is a common phrase we hear from novices, for regulars its a simple task!
Below we've listed ten tips for people wanting to start using ebay or even start their own online business!
1. Buy before you sell
You really need to buy on eBay to understand how the platform works and what eBay looks like from the buyer's point of view. You will never be successful selling on eBay until you learn to buy.
2. Learn to sell on eBay by selling on eBay
The best way to start selling on eBay is to actually start selling on eBay. Yes, there are some things to learn, but take your time, look at the eBay help files (and these tips) and just start selling. You will make some mistakes—we all do. But don't get frustrated or give up. You will get better with experience.
Also, selling will make you a better buyer. You will understand things from the seller's point of view and learn other ways to spot bargains.
3. Know what your selling!
One of the biggest issues with people selling items on eBay is the lack of knowledge. Its a good idea to research what your selling and make it known to fellow bidders/buyers that you mean business!  
4. Use keywords in your auction headline (title) and description
Remember that almost all eBay bidders find what they are looking for by using the search function. Be sure to use carefully chosen and accurate keywords in your title and description. eBay gives you 55 characters in your title. Be sure to use all of them. This will help you get hits.  Important keywords include the brand, color, size, and model number.
5. Your auction headline and item description is where it all begins.
Your headline is your advertising and your item description is your salesperson. On the web, how your potential buyer perceives you and your product is everything.
Be sure to use power words in your auction title (headline). Rare, Unique, Powerful, New, Unusual, Stunning, Top Notch, First Class, etc. Just be sure not to exaggerate. Don't call something "rare" if it is not.
Copy writing is the art of showcasing yourself and what you sell to your buyer in the best possible light. It's the most important thing you have going for you. A carefully crafted sales letter (item description) can increase your results exponentially without having to spend an extra penny.
6. Build credibility
Be trustworthy. Remove every doubt about your credibility. You can do this through presenting yourself positively through your feedback, being passionately devoted to your business and by being an expert. Create an About Me Page on eBay. A photo of yourself will humanize the online experience and can bring amazing results. One with your dog or cat in the picture is even better.
7. Set up an eBay Store
eBay Store listing fees are lower than for non-stores sellers. The inventory shows up in the main search results (just like any other 30 day fixed price listing). There are many extras that eBay Stores sellers receive, but based on price alone, you are probably ready for a Store once you are selling 55 or more items through fixed price listings per month. That is the break-even point between the fees and the Store Basic level subscription.
8. Launch more but shorter auctions
eBay places auctions ending soonest higher in the search results. If you have identical merchandise, run shorter auctions more often.  This way you will show up in the Time Ending Soonest and Best Match search orders more often. You will pay a little more in listing fees, but your should make this up by selling more items.
9. Know your fees before you sell
Here is a great little free tool for eBay sellers. It is an online calculator that calculates eBay and PayPal fees to help you decide the best price and format to list an item on eBay.  If you are running an eBay business this is a great little tool to help you figure out the best price to start an item and the most efficient selling format.
10. Don't get greedy and overcharge for shipping
Overcharging for shipping is one of the leading causes of negative feedback. and low DSR scores. You should only charge what it normally costs you to pack and ship. Buyers are sensitive in this area. They know when you are making a profit on shipping. You can charge a small premium to cover your cost of handling and shipping materials, but it should be reasonable. Always offer to combine shipping costs if a person buys more than one item. Explain your shipping policy in the item description.