I posted a similar thread in the past if you want to do a search, but this is what I have been doing lately: We have a great resale shop at our church, and I've gotten a lot of great finds there (mostly housewares, but all stuff that we needed). They sell them at garage sale prices, so I feel I've saved a lot of money by supporting them, rather than buying these things new. Anyway, I also don't have the time to deal with a garage sale, so I just donate my decluttering things there. I feel like I'm giving back to a place that is a good cause (it supports the church's work in the community and relief work), and where I've also been a beneficiary through receiving great deals. Also, you get a tax deduction, too. When I figure in all the time and energy that go into selling/ebaying, there isn't much of a margin of gain there unless the items are high-value or if you sell at high volumes.
If there are NWT items or things you may want to ebay when you have more time, I would declutter your closets and make space for the valuable things. I'm amazed how much room I can make by thinning out my closets of things we'll never wear.