From what I've seen, it really depends on how deep the training goes.
Short scraper course (1-2 days): usually around $500-$1,000
Full heavy equipment programs: can go $5k-$15k+
If it's just a basic ticket with some seat time, it's on the cheaper side. But the longer, hands-on programs with multiple machines are where it gets pricey. Most guys I know just do a short course, then pick up the real skills on the job