by close inspection, you need to determine the cause of leakage.  if you
have the original honda shafts, and your boots have not been changed
before now, they're almost certainly failing - it's highly unusual for
oem honda shafts to be leak any way other than because of a cracked or
damaged boot.

regarding the cost of repair, brand new aftermarket shafts, no core
charge, are under $100 each and they take about 10 minutes each to
change.  repairing the oem shafts, while a better technical solution
because they're better quality and last longer, costs a lot more because
the parts are expensive and there are multiple hours of work involved.
while driving, you'll be challenged to tell any difference.  and
financially, most of the time, the significantly lower cost of
aftermarkets, even though they don't last as long, mean you're still ahead.

96 EX Accord w 150k miles.  On right inner & outer & left inner cv
joints there is a grease leak from the ends of the boots.  Boots are
good & the boot clamps look ok.  Why/how is grease getting out?  No
typical bad cv joint symptoms yet.  Garage recommended new half axles
- apparently nobody changes just boots anymore because of the labor
costs.  Before I go that route I'll get a lot more miles out of these
- at least until they start clicking.   I've not heard of grease
leaking from good joints/boots.  It's the vertical sling out pattern
on the facing & backing surfaces & right where the boot/clamp there is
seepage.  Any ideas?