Curious to know how old is too old for an infant seat? Our DS is nearly 4 and we are finally PG with number 2. The seat (a maxi cosi cabriofix) was given to us before he was born, having been used for a friend's two babies. So, the seat and base are now about 7 years old. They've been stored in the loft, so light won't have degraded the plastic.
Would you buy a new seat/base, or use the existing one? DS only used it for 5.5 months before growing out of it and into his ERF seat.