That's a genuine Strad?! Yeah right and I'm the Pope.

The bloke is talking a load of "!%$*&!!! A genuine Strad would fetch half a million at the very least, even in a poor condition, so some 'local expert' supposedly saying it would be worth £100,000 in good condition, is a load of old tosh.
I've looked at and handled enough 17th and 18th century fine Italian violins to know this is a German instrument dating from sometime around the late 19th century. The varnish is not Italian, it's the wrong colour too. Strads are oil varnished and have a real golden brown ground underneath the top coat.
The whole thing shouts "I'm German, pay 20K for me if you're name is Stupid".
Look at the dodgy photography as well