I just got done replacing an older GE Al buss panel with a new Seimens 200A CU buss panel.
Parts & labor about $600.
Of course, this isn't my regular price - the guy is a long time family friend who's helped me out numerous times in the past, so I only asked $10/hour & no markup on parts- he gave me about $30 all said & done.
A 100>200A upgrade? Going rate in Northern IL is $1200-1800, depending on variables.