Give me a link (computer store website, eBay link, etc), and I'll buy it. Probably. I am not fussed about what I get.
A few small requirements though:
1) Pre-built. If necessary, I will also hand in my OzBargain licence and pay the labour fee.
2) A SSD hard drive is preferred but not fussed about size.
3) Don't care about what CPU, motherboard, RAM, or graphics card it is. Any will be fine.
4) Monitor not necessary.
5) If possible, a quieter computer would be nice.
Apparently there might be a 10% site wide tomorrow on eBay so if you got any decent value eBay listings, I'll keep a watch on them.
For reference, the hard drive I am currently using has a "Power On Count" of nearly 4000 times and a "Power On Hours" value of nearly 30000. It should have died a long time ago. Such a pitiful thing, being forced by me to slave away this long.
For that budget, I'd go for a refurbished dell that goes on sale frequently. Just get one with a ssd.
Here is an example.
https://www.ozbargain.com.au/node/400667