The sound samples are great and at this price, the bass is very good value indeed, IMHO.
With regards to the repair, work, it's understandable that potential buyers will have concerns.. I know i would. Worries about what will happen to the bass over time or even, worries about the potential re-sale value of it, have to be taken into account before commiting to buy.. Having said that, I had a very lovely BC RIch Eagle a long time ago that had a repair done on a broken neck by a very skilled luthier, and after that work was done, the neck was even stronger!
I'm sure that if Chris at Overwater oversaw the repair on this bass, then the work will be of a high standard.. It stands to reason that the quality of any work that he authorises to come out of his workshop will HAVE to meet his exacting professional requirements, especially on one of his own basses.
Good luck with the sale!