K.
Try listing your stuff on craigslist (chicago.craigslist.com). I've had terrific luck with selling and buying things there. Be prepared to deal in cash, of course. :) Maybe do it 1-3 items at a time (bring them into your home for a week or so until they are sold) - repeat until it's all done. Unfortunately, it's not a good time of year for garage/yard sales.
Also depending on how much $ you want for the items, check with local churches - many do kid item sales yearly as fundraisers and you can get a tax write-off for donating.