It's a pretty good system for $500. But a concern would be the outdated platform. It's good enough for now, but you don't have many upgrade options. The CPU is good enough for the GPU. And the GPU is good enough for modern AAA games at med-high settings. Is all the RAM in dual-channel? How many sticks and at what GB are they?
Location is everything, that's going to determine local prices and availability.
For just over $500 US$ in the US, you can get a decent B450, new Ryzen 2600 and 16Gb 3200MHz DDR4 and Rx580. So balanced against a $500 5yr old used non OC i7, single channel ram usage, and a downgraded 1060, then no its not such a great deal. But in Indo-Asiatic markets, that's a decent price for that stuff and the Ryzen build would be a lot more.
500$ CAD***
Cinebench, like Shogun, wasn't really added to show a delta as much as it was added to illustrate a point: That multi-channel memory platforms have very little impact on specific tasks, like gaming and some types of live rendering. The delta between single- and dual-channel configurations was 0.25% in favor of single-channel.
Like I said, easily within normal system fluctuations. I also tested Skyrim's load time with several high-fidelity mods loaded, which should have theoretically hammered RAM and I/O for file retrieval, but saw effectively zero advantage between dual- and single-channel performance.