Hey is it okay to buy a breast pump from someone or should I get my own?

it's fine, but get new hoses, and anything their breast milk may have touched. you can usually get that stuff from the manufacturer or store. the pump itself is fine.

if it's a closed system it's fine. if it's not it's advised against because the motor can have mold etc. since moisture can get in it.

I got mine used and I bought new tubes and everything.

Check with your insurance, they might provide you one!

my husband's cousin bought me her friends pump she used it 2xs maybe I just boiled all the tubing and bottles out really well since she barely used it