M.H.
Go to detroit.craigslist.org
It is a website where you can buy and sell stuff locally. I see used sit and stand strollers on there all the time and they usually run around $60 - $80. You can get all kinds of baby equipment on there. They have section just for baby and kids. I bought one from there and then sold it a couple of months ago on there. They are fantastic, I loved mine but got rid of it because I thought it was time to encourage the kids to walk more now they're bit older. Loved it while I had it though.