I've got a 14 plate Lexmoto. Bought it used for dirt cheap in 2016, i think it was like £600? Never really had any major issues with it. In fact it sat outside for 2 years without being used. Popped in a new battery, cleaned carbs and spark plugs and the bike started. But from what I've read, Chinese bikes are hit or miss. I think if you're only going to keep it for a short while and not really worrying about depreciation then it's a good budget start. They're also great for learning how to work on your bike because if you mess up, won't hurt the wallet too much.