ArcaOS 5.1 gives vintage OS/2 a UEFI facelift for the 21st century
theregister.com> The Personal Edition is priced at $139 (£110). For owners of older versions and licensed copies of eComStation or IBM OS/2, update packages are available
Too expensive for something you just want to try and nothing is guaranteed to work.
[Author and submitter here]
It's a very niche product from a very small company. I think it's fair. It is going to put most people off, yes, but this is definitely not an OS for most people.
eComStation 2.1 is on the Internet Archive. I've installed it on bare metal on a Thinkpad X61, and it worked fine. I was not able to work out the long chain of dependencies necessary to upgrade Firefox to something useful, though.
They're also pretty bad at customer service, taking down a video that supposedly talked about a pirated version of their software (it wasn't): https://nitter.net/mjdtweets/status/1621268945876537345