Cv boot
I debated this as well. Once you think it through, it makes more sense to replace the axle. Axles are less than $50 and require about the same amount of labor.
Utility trails
I was told about a trail near me that's used by the utility company to service transmission lines. This was my 2000 4runner's first serious off-road challenge.
I was totally impressed by how capable it is. Only lift mods are 99 talls front and rear with 1.5" spacers in the rear...
I guess it's not that bad, but it's getting worse. A few years ago it was a drip. Now it's more like a very small puddle.. I bought a bottle of the at-205 to try.
I may try it. The issue I see is with the dried toyota seals. They are more like bakelite at this point, and I'm not confident that they will absorb anything.
As far as the quotes being high, I guess it's the area. All three are small shops known for being reasonable.
Got a few estimates today and thought I would share the info.
2000 3.4 4WD
The estimates ranged from $689 to $998.
$60 in parts + cost of an oil change + 8 hours labor.
Also had one shop quote me a timing belt kit replacement. $1100. I was told this one first, so the Rear main repair seemed...
I would go ahead and add $1000 to the purchase price. Suspension, bushings, fluid changes, brakes, etc. A twenty year old vehicle will need some tlc. Worth it in my opinion.
I only replaced the inner and outer seals. Fixed my leak for now. It's a good time to replace the rear diff fluid and rear brakes. If you do the rear brakes I would also replace the cylinders.