If your playroom is currently looking more like a play pile, and your kids' bedroom more like a giant closet full of ill-fitting clothes, a thorough clean out is probably in order at your place. But wait! Before you throw it all out, have you considered having a yard sale for it...online?
A lot of secondhand kids gear is suprisingly easy to sell online, if you know both what is saleable, and the right places to advertise.
The first thing that should be on your to-do list is to set up some way of notifying friends and neighbors of what stuff you're looking to pass on. Try starting a Facebook group for your "yard sale", or an invite-only blog - any place where you can add friends or friends-of-friends, and have a central hub to post links to other sites around the web where you are listing all your goods for sale.
Beyond that, head on over to:
1. Craigslist - list here any furniture and decor, as well as popular, expensive toys (think LEGO, ride-on toys, American Girl dolls) or large collections of toys (50 My Little Ponies that never get played with? Perfect!). List your old baby equipment here too.
2. eBay - children's clothes sell well on eBay, provided they are in good condition and are from known, popular brands (anything from Gap, to Crewcut Kids, to European brands like Smafolk and Molo). Also, vintage toys are popular on eBay with collectors. Make sure to post plenty of high-quality pictures!
3. Local swap and shop groups - my local area has a swap and shop group online for Moms and Dads looking to sell their unwanted kid and baby stuff. How did I hear about it? At the playground of all places! Talk to other local parents, and if that fails: Google/check Facebook to see if there's one near you.
4. Apartment Therapy Classifieds - let's face it, if you're an Apartment Therapy parent, you're a design savvy parent, and design savvy does well on the classifieds. If you are getting bored of that rug, side table or crib, go here and list it!
At the end of the day, you might not sell everything you list online, but even if you sell a few things, that's a few extra dollars you didn't have before that can be stashed away into the kids' room makeover/new toy fund.
Happy (virtual) yard sale-ing, and best of luck!