Car seat issues for foster children

Kimyas, we have a similar age range and I picked up a Cosco Scenera, which is under $50 and goes from 5 - 40lbs. I did some research and it seemed to be able to fit chunkier kids than the Graco equivalent. I wanted something that gave me as much leeway as possible. I was very impressed with the seat when it arrived - it seems pretty comfy. I figured that if a child arrived w/ an infant seat, I could use this once they outgrew the baby seat if they were still with me. Also, if the kid moved once he/she was riding in the Scenera, I could send that on and know that the kid would be in a safe, size-appropriate seat that would last them a while in their next home. I picked one up after Thanksgiving for $35, I think - they seem to go on sale for ~$40 fairly often at Sears & Kmart. Yes, they just need to send me a placement so I will stop obsessing about baby gear!