I've used Namecheap/PositiveSSL[0] for stuff like that in the past; under $10/year, and never had any issues.
Bottom line: so pleased that I had acme.sh sandboxed in a jail to generate certs… what a shitshow that ended up being…
LetsEncrypt is free, and sure, you have to run the cron job to cycle the certs, but honestly, it's painless.
Use Lego and Dagu
Or buy a "real" SSL cert that I don't need to fiddle with every few months.
I think there are some browsers that won't even connect to HTTP/80 without a warning ?