CV boots will usually last around 80,000-100,000 miles, depending on driving conditions and care of the vehicle. Since you have a 93 it's safe to assume you have some where near that milage. The boots usually go near eachother in time also, obviously since they are the same age. Most often the passenger goes first then the drivers. There's nothing really wrong with the axles or the boots, it's just an 8 year old car. Be prepared to fix things on it going forward.