When I was in college we had to "check out" the pianos. The school then has a record of who was in the piano room when the damage was done.
No matter how yo look at it, the price for the pianos is right. If they paid $6000 each for some modern electronic piano, they'd be out $200,000 and have to completely replace them every 5 years. These pianos can theoretically last for hundreds of years. Sure you have to do a $2000 rebuild every 10 years, but that keeps the piano tuners in business and helps the local economy.
Decent electronic makes have support from their manufacturers for decades. I know because I just sold a 20 year old Roland HP2700 and it sounded and played like new, though the case had some wear and tear. In that time, I spent maybe $300 for maintenance parts, some of which were improvements over the originals.