Cool video about Sam Zygmuntowicz, who makes violins in Brooklyn. I know next to nothing about violins and had never hear of Zygmuntowicz so I looked him up...
Isaac Stern owned two of his violins. After Stern died in 2001, both violins were sold at a Tarisio auction in 2003. Each violin surpassed the previous record for the highest price paid for a string instrument by a living maker at auction. One of the instruments sold in 2003 was a Guarneri-model violin made by Zygmuntowicz in 1994 for Stern. That 1994 violin currently holds the record for the highest price paid for a string instrument by a living maker at auction. The violin was sold by Tarisio for US$130,000.
So, he seems to be good at it, then.