Do you keep your baby's old clothes or give them away/ sell them?

Hi! First time mom here. Just wondering what to do with my son's old clothes (he's 7 months now). I'm thinking na ibenta yung iba (we will keep some as remembrance) as 2nd hand coz wala naman ako pagbibigyan na kamag anak. On the other hand, we are planning na sundan si baby when he is 2 years old. If baby boy ulit, magiging nostalgic and cute if we let him use some of his kuya's old clothes. Pero if girl, syempre we need new set of clothes.