N.S.
Hi there,
I bought a really cheap carseat at walmart and my Son loves it... Its only 50$
They have the same one in blue and black Below
http://www.walmart.com/catalog/product.do?product_id=1943168
Also if they are smaller - May I suggest this one which I also had.
http://www.walmart.com/catalog/product.do?product_id=8054497
Also - Try www.Craigslist.com They have Carseats for sell in Kids Section.....
Also Google - KID TO KID - Baby resale shop....... my friend got a carseat there for 20$
Also Locacl Churches can somtimes help!