Hi and welcome, depending on what amount of abuse it's had, Chinese bikes are prone to lower quality control, but that depends on how involved the parent company are with their own QC control, my bike is Chinese made, and up to now no issues, but i did buy mine new, so i do have some peace of mind with warranty etc, looking at the type of bike, it may well have had a hard life, if used off road, it may well have tired suspension, the chain and sprockets could need replacing if not cleaned regularly, off road style bikes need more maintenance than a road style bikes, if you really want it fine, but get it looked at by an expert, but remember caveat emptor