What are your plans for it? If you plan on wheeling it, the earlier front axles were a little weaker. Other than that, no worries with that many miles.
For clarification purposes only: Its not the front axles. Its the difference between the spider gear pinions, and more appropriately the carrier itself: '98-'99 had 2-pinion and '00+ had 4-pinion. However there have been documented failures with 2 and 4 pinion designs.
The most prudent advice would be to add the ARB front air locker before the calamity occurs. This way you preserve all the internal parts and associated costs. The ARB carrier is significantly more rigid preventing most if not all the flex associated with the OEM failure points.
FWIW: You don't necessarily have to be a hard core wheeler to experience the failure. Think of the fix as a preventative maintenance item...or insurance ;-)
So, should I pull the trigger? 126k, $11,500...I am in no rush...I would like to get something in the next two months. Thoughts? Should I take the plunge? Or, look for something with lower miles?