Good afternoon .
Since I'm retired and live on a fixed income...I have to say that buying a refurbished system is not a financial consideration, when compared to buying a new system.
The fact that the newer system reflects what is...versus an older system reflecting what used to be...is one item of consideration.
The fact that a new system will provide at least one year of quality repair benefits, via a warranty, whereas a refurbished system reflects a limited, if any, warranty...is one item of consideration.
Even though eBay is now listed on the stock market...and has been a source of products for some for a number of years now...I don't feel that the vendors on eBay equate with the vendors available outside of eBay. I have more confidence in a new product I purchase from Amazon.com...than I could ever have relative to an item I might purchase via eBay.
Refurbs...are refurbs...for several reasons. Many of them have been leased units made by OEMs,,,which have suffered use and misuse by various users...and now are being "sold" because they no longer are viable rease/rental material., being replaced by newer models. Many of them are items which were returned because of physical defect...which has been repaired...and are now sold with virtually no warranty rights.
I suggest examining your premises again...before executing any purchase of any sort.