I got ours from the warehouse sale at Goore's. Still pricey but nothing like they were new. In hindsight, I would have splurged and got one that reclined since I spent a fair amount of time in it nursing/sleeping.
Nobody said life would be easy, they just promised it would be worth it.
Ditto Craigslist. We shopped around in stores until we found the features/brand we liked and then waited for the right one to come up on Craigslist. We ended up driving over an hour to get it, but saved about $300 off of retail and it was in almost new condition... You've got plenty of time :-)
Re: Where did you purchase your glider?
Craigslist
I have champane taste and a cheep wine budget. My mom and I then recovered it and well I just love it.