Noticed a slight vibration a while back, occurs most noticeably at speeds of about >100. Wasn't all that concerned and was due for new tyres so I thought it could be a wheel out of balance or something like that.

Anyway, got new tyres and a wheel alignment today. Forgot to mention the vibration but the tech said to me that he thinks the right rear wheel bearing might be on its way out because it felt a bit dodgy.

Could be the cause of the vibration I guess.

Anyway, does that seem normal for a car with 98k on it?
Does anyone have any idea of cost of repair?
Is it worth doing the rear left as well? Fronts too?