Stroller help

Sav

I never bought a car seat or stroller because my SIL offered hers so that we could save money. My daughter is now 6 months and the stroller is falling apart! Its an evenflo sibby in case you’re wondering. My question is....is it worth it to buy a new car seat and stroller since she’s already 6 months? Should I just buy a stroller? The car seat is fine but I feel like she would fit better in a bigger seat.