It depends on what you’re getting it for and why. Also, never pay for training and certifications, especially the pricey ones. It should be your employer paying for it.
For sure, my company is willing to pay for it, I wouldn't be paying for it myself.
I just don't want to work with windows anymore, and every job I get is windows centric; therefore I get a small amount of linux experience on my resume and the cycle continues. I'm contemplating getting the RHCSA and the RHCSE in order to get linux-centric roles (because although I'm down to take a cut in pay and settle for a junior position, most of the jobs available seem to be for senior or mid-level positions).
Have you considered the cheaper LFCS (Linux Foundation Certified Sysadmin) instead?
It might be easier for the company to "swallow" and it's more general Linux instead of mainly Red Hat based.
I took it this year and it's pretty standard System Administrator stuff.