Edit: The company offers many different carriers. I would ONLY suggest using German Post (DHL). They are by far the most reliable with best customer service. Buyer beware with czech post or others.
A few of us recently discovered that Pinball Center was no longer shipping to the United States. As many of you know Marco sells some pretty exclusive pieces and is an asset to the hobby. I was planning on placing an order and having it shipped to a friend in Canada, and then have him ship it to me here, but the costs were more than I could stomach. It then hit me to look into mail forwarding services. I run a couple of online stores here in the states and it is not uncommon for our international buyers to purchase something and then have it shipped to a mail forwarding service.
As luck would have it there were two such services in Germany: mailboxde.com and mailbox Germany. These services essentially provide you a German address to ship your parcel to. They will receive your parcel, open it up, photo document it, combine it with other orders that you may have placed and send it on its way to you in the US for a relatively minimal handling cost.
I decided to go with Mailboxde as they would allow me one time use and had no monthly fees unlike Mailbox Germany. Shipping from Pinball Center to MailboxDe was 4 euros and from mailbox DE to Us total charge for German Express Shipping was 37 euros (plus another 2 euros for bank transfer).
The turnaround was pretty fast. It took one day for the parcel shipped from Pinball Center to reach Mailbox-De and Mailbox DE wrote me within a couple of hours of receiving the parcel. I paid up and got a shipping notification the next day. The parcel is currently en route as I type this.
The registration process was fairly easy. Simply fill out the required fields and they provide you a "mailbox" number-essentially just a customer ID. Once the parcel has been received by them you can request photos, consolidation, etc. I just needed a quick turnaround, so I selected my shipping method, it gave me a quote and I went up to the tab that said "recharge" paid the shipping costs and was done.
Below is the price list for a 2KG parcel. Not bad at all.