yea along with what gussie said.. have the alignment checked out.. should prob run you about 70 bucks.. if you are told its been done before.. chances are you have bent suspension components.. low speed vibrating could be a few things.. possibly out of balance or bent wheels.. but that would probably get worse at higher speeds.. a bad wheel bearing would cause a tapping at speed, possibly vibration too.. or a bad cv.. but that is usually more pronounced during turns.. id get it looked over very closely by a good suspension place before going any further.. even so id probably pass on that vx and find another.. they arent THAT hard to find.. especially if you use this forum, we can help you find a good one at a fair price