D.S.
check out www.freecycle.org and find your local area, they offer things still good that people are done with. I run a local chapter, and we see car seats on there a lot. Make sure it is new than 8 years, and has never been in an accident. I think size and neck stability is the issue with front to rear, how strong is your baby's neck? My sons are tall. Winter clothes made the seat too small until the warm weather came for both of ours. Good luck.