Ultegra Groupset

I have a fellow who will sell me a used Ultegra 10 speed Groupset for $150 ($US)

set contains 6700 rear derailleur 6700 front derailleur 6700 cassette (11/28) 6700 chain 6700 shifters (set)

Comes with brake levers, which are useable but right one is very badly scratched. I assume the...