What are good things to sell to make money

What are good things to sell to make money - I may not be able to sell as much since my apartment is smaller and i simply don't own a lot, but for a young person (or even someone who's making a good living for themselves) making an extra 0/mo can go a long way, from paying off your credit card bill faster to being able to go on that trip you've been planning for a while. Taking 5 minutes to google your item and learn its true market value – on ebay and on a bunch of other e-commerce sites – helps you to sell it more competitively because you'll find out whether or not there's a market for your item, you'll see the right price, and you'll figure out the right search keywords to write into your listing. As a few examples i sold a collection of scratched up cds without covers/liners at one point and made good money; i sold a collection of beermats i'd accumulated in pubs a decade ago in my drinking/bartending student life in ireland for several hundred dollars; and almost to my own disbelief i sold some newspaper clippings at one point too. 't it be more financially sound to just donate, spend that 10 minutes taking pictures (of a lot of items, no need to be pretty, and you can get in 10 things instead of 1), 1 minute per item listing it on a spreadsheet (for tax time), and then 30 minutes driving a large box of stuff to the salvation army?