My first thought is try to find a used demarini CF (-11) for around $100. If she swings a 30 or 31, Dicks has the CF ZenNIW with warranty right now for $165 plus tax. Good deal.
As for the stealth, I assume you are talking the 17 or 18 stealth flex, most didn't think much of them and $150 is high. I bought one over a year ago new for $120. We actually thought the ball came off of it pretty good, but It swings like a easton...heavy which ultimately at the time lead my kid away from it. Will weigh 1 to 1.5 ounces over what it says. A CF will weigh exactly what it is supposed to.
SPC Sports is unloading all of their 2019 demarini CF-XDs on eBay. New in wrapper with warranty. Averaging about $100 a bid. Might want to go after a 31/21. Adjustable knob can be set to either 30", 30.5", or 31". Very balanced with a long barrel.
Sorry. I'm not a fan of the Stealth. It is what I would consider a middlin' bat and overpriced at $150. You can do better on higher quality bats IMO. I'll echo others on finding a bat your DD likes to swing.