FYI, a new Philips Respironics Dreamstation Auto DSX500T11 can be had for under $400 on Amazon, and the Resmed Airsense 10 Autoset is $440 to $519 depending on the day. I prefer the latter.
My complaint would be that you got a discontinued CPAP with some hours on it. They did that because they saw "sucker" written on your face. Sorry, but had you come here first, we would have alerted you to the common tricks. Most of us insist on an Auto CPAP because the billing code is the same whether they sell you a discontinued fixed CPAP or the latest auto CPAP.
Your unit is a good CPAP machine. The 60 Series was out there from 2012 to 2015, but has been superseded, and the older 60 series were sold cheap as discontinued items. The later 460 models also had an Auto IQ mode that allowed users to try auto CPAP to set pressures. I would take a look at the therapy information on the machine and set it to 30 days. It will tell you how many days of use are there, and provide averages of use, AHI and other information. If more than your data is there, you should reset the user data, or return the machine. You can get the free provider manual for the PRS1 CPAP Pro st the the link for Setup Manuals
http://www.apneaboard.com/adjust-cpap-pr...tup-manual This will show you how to fully access all the menus and settings.
I'm not a fan of the APEX Auto, mostly because it uses a proprietary software for data. It is a relative newcomer to the U.S. and marketed mostly in Asia until a couple years ago. They are inexpensive, and most customers can get good results. There may be some reviews in the review section of the forum.