Is it okay to use pre-loved baby items?

Salam alaikum, My husband’s manager, who isn’t Muslim, kindly gave us a used stroller for our first child. My mom isn’t too happy about it. She says, ‘We have enough to give charity, so we shouldn’t be taking someone else’s charity.’ But I don’t see any issue with accepting this gift. I believe the manager offered it with good intentions, and reusing things seems perfectly fine to me. Now I’m a bit unsure, though. I love my mom, but sometimes her beliefs aren’t rooted in Islam, and I haven’t found any reliable source that says second-hand items are problematic in our faith. She also worries about things carrying bad vibes, but I don’t buy into that. My husband and I feel it’s practical to save money and use pre-loved stuff, even for our first baby. We’re financially comfortable but careful with spending. As new parents, we think it’s smart to reuse things unless there’s a hygiene concern. JazakAllah khair for your advice. How can I help my mom see that this is okay?