my old shimano 600 (precursors to ultegra) hubs made it to about 12-14,000 miles before the races were worn enough where you really couldn't true the wheels.

If the LBS can check the races (where the bearing rolls) and if its worn, get a new hub. If not then no reason why you can't use the wheels.

If the rim is worn that's another matter. So have the wheels checked before you go by a brand new set of wheels.

smilingcat