At least they have been refrigerated - if you are prepared to experiment, getting these films might be a good way to have some fun for a small price.
If you aren't concerned at the film giving you spectacular results and just approaching from an experimentation angle, think you'll have some fun!

I've bought old B&W paper to have a play with - so far I've only had one box that yielded nothing but fogging; the best one was an unopened box of Agfa from the early 70s that gave 100 perfect results!

Nothing ventured, nothing gained.