The process to sell your stuff online is pretty easy. I’ll talk through the process of selling your stuff on Craigslist here but it can really be applied to eBay or any online site.
Resist the temptation to “trick” people into looking at your ad with lots of exclamation points or asterisks, this will just annoy people. Do not use all capital letters in your title, it’s the equivalent of online shouting and will turn buyers off.