The version I bought wasn't generally available in the UK either yet I still managed to buy one. The main thing is to ensure that the phone is compatible with the networks in your home country and any you might visit. It might be supplied with a different language by default but you can normally change that easily. A brand with a decent reputation for providing software updates and no or minimal bloatware is preferable.
I've bought phones in Thailand that weren't available here at the time (Oppo and Imobile) but flip phones seem to be unique to South Korea.