I think that really depends on the school you're talking about. Baseball is probably right up there with Hockey as being a rich kid sport.
Before anybody gets all bent out of shape about what I'm going to say keep in mind I have had two kids play USSSA baseball at the same time. We're down to one playing travel/freshman ball and one playing rec league right now.
If you're in a relatively wealthy school district baseball is still huge through high school. When I say relatively wealthy I'm thinking West Des Moines, Urbandale, or Cedar Falls. If you live in one of those areas you've probably got several club baseball programs to choose from who will gladly take your $600-$800 for fees, then you need to buy a $300 bat to keep up with the Joneses and a $200 mitt. That bat if you're lucky will last two years before the kid out grows it or if you spent big money on a composite one the damn thing is probably going to crack during one of those cold April tournaments. Then you get to 13U and need a drop 8 bat then again at 14U you need a drop 5 bat and then when he's a freshman you need a drop 3 bat. Maybe you could save some money buying a cheaper glove but then you're probably buying a new glove every year because of the schedule that $80 glove feels like a wet paper towel at the end of the season. If you're a kid from a lower income household you just can't make that work but you can play rec ball and that's a whole lot more reasonable thing but seeing the difference between the two where I live you've got a whole bunch of kids who are unprepared for high school baseball just because their parents didn't have $1500 laying around to drop into their kids making up for the parents athletic failings.
Now you get into the have nots like a Waterloo East where half the varsity bench is made up of 8th graders. Baseball needs to figure out a way to get those lower income kids involved or in another 50 years it'll be a super niche sport that ends up on some 3rd tier channel where MLB is buying the air time rather than getting paid for their games.
That's true and it's too bad. I had the same glove from 6th grade through high school. It was huge for a couple of years but I grew into it. Never had a bat. Would just use somebody else's bat (of course, bats were cheaper and fewer bat rules). Also never had a bag.