Is it worth buying this car?

It would depend on where you live and how the brand is supported as to if it's a car to buy. It's the same thing in most areas. In the US for example there are some brands sold that are very hard to get parts for, while others you can buy the parts anywhere. I would consider what parts you are likely to need, like filters and tune up parts. Brakes and such shouldn't be that difficult but a way to find out would be to simply call a few part stores and ask for a few of the parts. Like call asking for front and rear brake pads, or for filters to fit it. Just use the make model engine size and transmission type and see what they can get, if they say "Sure we have XXXXX on the shelf" or "We can get that for you by tomorrow" then I wouldn't worry so much about parts. Although it is branded as a Chevy it is built in the former Daewoo plants which GM simply rebranded as theirs when they erased the Daewoo brand from the lineup.