[Ben e92 / f30]

I've currently purchased a set of Eibach Springs and now need to get them installed. I've called 5-6 reputable shops around the area that I live in and I'm getting quotes from $300 - $1100 for installation of them! For anyone who can't install them (like myself), and has had to go to a shop to get them installed, what prices have you paid to get this service done? And I've also been told that I must get an alignment afterwards as well, is this true? Thanks in advance for the info.