Inspection shows a slight leak, how bad does this look to you guys? This is right front and left rear.

Estimated time or cost to fix?

 

Personally I would clean that up with a rag (do not spray anything directly on those) and have the clamps tightened more. Quick and easy and may work fine versus having to pull everything to reboot or replace.

 

Time for both, my guess a day, 8 hrs

cost, rock auto $100 buck a piece.

 

A few things:
1. I recall hearing that these boots/clamps had a slight manufacturing defect, where the clamp slightly pierces the boot over time. It's nothing like a typical tear (which would let a large amount of grease out). Mine (2019) has this tiny tear on the LR outer boot, and I saw just a tiny bit of crud over the years (exactly like yours). I zip tied a fancy plastic sleeve over it 6 months ago and all has been well (see attached photo). Even my mechanic is very satisfied with this "fix".
2. There is a BIG difference between a proper LR OEM axle, and a cheap RockAuto axle. They are not the same. LR is a heavy duty version for the higher torque and stress of off-road.

 

Yeah, I would rather find a good low mile used axle assembly than go with anything cheap/aftermarket unless you never leave pavement and never go on long trips. The failure rate of cheap axle sets is very well documented. But used? If you can run the VIN and make sure it has not been in a wreck on the area you need a part for, game on! I found a wreck with only 16k miles on eBay. Verified it (Google works) and bought a bunch of parts off it. Just my 2 cents...