Anyone use 2013 imac for CS5?

Considering buying a late 2013 imac for Illustrator and Photoshop CS5.  It has Sierra loaded on it right now, which hopefully won't be a problem since I'm able to use my CS5 on a macbook pro with Sierra now too.

Can anyone advice me if this imac would be a good purchase for just under $1,000?  It has i7 processor and 16gb ram and both HDD and SSD.  The specs are great, I'm just worried that it's an older computer and won't last for too much  longer. 

My only other option is to buy a newer imac with only 8gb memory and then I'd also have to upgrade to Adobe CC which I am desperately trying to avoid.