Not only repair, but the very fact of being broken has been priced. The Victory of Samothacia (currently at the Louvre, in Paris?)is often said to be much more beautiful in today's condition than in her youth (although none of these art critics saw it then!).

In Spain, old pieces of pottery for sale to collectors are often overpriced when broken and repaired by one of those workers that were travelling from village to village to fix the broken wares with the help of "lañas"(i.e.small straps of metal,usually copper)-- a craft naturally lost long time ago.

I have heard of a master of the Tea Ceremony in Japan that broke and repaired an otherwise common cup, in order to make the present of a unique -- thus precious -- piece to his honoured guest.