My opinion

I've always wanted a few Bally EMs and this title is a great game. I think the Bally machines produced for the German market are not as desirable as they have both the playfield and backglass in German AND they won't have chimes or a bell (pre chimes). Rockmakers is rare, and I doubt you will come across an English version. If you really like the machine, then you will have to settle with the German version.

I would contact the seller - as I believe he has a few EM project machines out of Europe. If possible, view them in person.

English version $1200 - $2000 Depending on condition
German version $750 tops Depending on condition