Finding a way to break the news to the mil

My mil is so cheap when it comes to my daughter! The other 2 grandkids she easily will spend so much on. We all went Christmas shopping for the kids and I happen to notice she bought the other kids gifts all new. And today she texts me s picture of a bunch of infant toys my daughter had any. The picture was from Facebook garage sale and it made me upset. I understand my baby is only 3 months old but why treat her different. I sound like an ungrateful bitch when I say I want my child’s toys to be new. So I’ve been just ignoring her and hoping she doesn’t buy them. Advice on asking her to treat my child like the others.