Thank you for the response. I’ll look into the reseller avenue. The machine went off maintenance long ago. Hence my desire to get an alternative look at the cost of keeping it up to speed in OS and OS options.
IBM is the only source for OS400 (i5/OS), but you may be able to buy/obtain it from an IBM reseller/agent. You may be able to get some sort of discount on the initial cost of the software itself, but I suspect you will always end up paying the same price for maintenance and licenses. These are normally dependent on the number of users and/or processing capacity of your machine.