If you don't have family or friends to pass things down to, Craig's list is a great way to get some money back from "gently used" things like baby swings, playground stuff, baby carriers, bicycles, etc. You can often get about 1/2 of what it costs new if it is in good condition, and the best part is, people come to pick it up so no shipping involved.
I love craigslist - In addition to buying and selling, rather than filling our dumps up with usable items you don’t want to sell, you can post them in the “free” category.
CostcoMama
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