To save others a click
"Specs:
Intel i5 4690K (overclocks to 4.4 GHz stable, without additional voltage)
Gigabyte z87x-D3H Motherboard (with SLI support)
XFX R9 280X 3GB
8GB Patriot Viper DDR3 RAM (1866 MHz)
500GB Seagate Storage
Thermaltake 500W Power supply
Bitfenix Comrade White Gaming Case
(Could include USB keyboard, mice, and speaker set)"
It is a several year old, second hand mid range machine (fairly low RAM though of a decent clock and small hard drive, possibly to pay for the GPU which is not that bad or maybe there was extra storage which has since gone to something else) at the time with what has to be one of the nastiest looking cases I have seen since the 90s. Why anybody would price it up using new parts I am not sure, well actually I am but I am trying not to be quite so cynical this morning. The games mentioned are hardly system killers and it also fails to mention the settings used for the fps counts.
Upgrade potential is not absent but I could see this being a "get shot of it while it still has some value" play.
I would not personally buy it unless it was going for a token sum. If they have priced it at that you are unlikely to get it down to a level I would feel comfortable paying out for.
It is at this point we usually get to spec up something equivalent, and I did start but it seems some of those parts are in the "legacy good stuff so we know you will pay it" price bracket and you could probably do better another way. General parts seem to be pretty high in Canada, maybe due to the less than stellar exchange rate but who knows, so I would have to take that into account.
I had a quick look around and there are quite a few computer refurb places in the Vancouver area, several selling old business class machines with nice processors and memory that you could then stick a GPU into (maybe with a power supply upgrade).