This model is the Early 2015-built, Mid-2012 spec 13" (you can see it, inception style, in the screencap above). Yes, they were still building them in Early 2015, because people like me still bought them (I upgraded from a Mid-2010 13" that outwardly looked identical, so I kept that thing for 5 years). I purchased it on March 31st, 2015, and it goes out of AppleCare at the end of this month. It’d had quite a bit of recent work done, and might get a couple of small things done on the last weekend of this month just to make it tip-top before it goes out. I probably won’t be replacing it any time soon, even once it goes out of AppleCare.
Apple put a new battery in it last year. I think it’s only on like cycle 277, which is still higher than it could be. I’m hard on batteries because I am a teacher, and I am constantly moving it from my staff room desk to classrooms and back again, so it spends an awful lot of time on/off battery power, and not a lot of time sitting on a desk plugged in.
If you get one of these, try to find one with a manufacture date of 2015. Mine was made February 9th, 2015.
You can look on eBay, GumTree, …here on this forum. I would get mine from some of the shops in Akihabara I know well (like where I got my Mac Pro), because limited warranty. But that may not be an option if you are in Straya, obviously.