On such a computer, I will accumulate in a few months. Although such a configuration, I would not buy. The configuration is unpromising, but it can solve today's problem.
CPU: 3.0 GHz Intel Core 2 Duo Processor - considering 3 GHz, this is the E8400, it is an ancient and unpromising stone, it costs about $ 3 now.
Optical: DVD-RW Drive - I have not been using it for more than five years.
Most likely, some kind of video card is not at all expensive and not much better than mine, otherwise they would have indicated the model, the same thing with the motherboard, apparently quite bad, if they had not even mentioned it.
I would rate this computer at $ 20-40, not considering the cost of the monitor.
For 300 dollars you can buy a ryzen 5 3400g processor with an integrated Vega11 graphics card, this is about a level of nvidia gtx 1300, 16 gigabytes of RAM, SSD256, a motherboard based on a B450 chipset, any power supply + case. And there will still be about $ 100 for the periphery, Later you can buy a decent video card and this assembly will be relevant for about 5 years.