Need Opinion on Speaker Repair

I am looking to purchase a pair of Acoustic Energy AE2's from a local person. The seller has indicated that one woofer has been repaired for a torn surround but that the repair tech has tested all 4 to be up to spec after the repair. Has anyone ever repaired a surround and can it be put back to "new" status??

In addition, while the speaker was being repaired, the facility upgraded the caps, wiring, in the crossover to a better quality type. Recommended??

thanks for your opinions.