According to a post on the BenzWorld forum:

The price for 10 Sprint Booster (MERCEDES -BDD 451 - BDD 451A) including shipping costs and custom brokerage fees will be 2.024 Euro.
The price for 20 Sprint Booster (MERCEDES -BDD 451 - BDD 451A) including shipping costs and custom brokerage fees will be 3.835 Euro.

I' d also like to inform you that you may be responsible for additional taxes & customs duties in US.
The above prices are export prices for USA only.

Shipping is via UPS door to door service (Aprox. 5 days delivery).
The payment shall be via bank transfer.

Best Regards,

Stamatis Boulekos

According to my calculations, thats $244.89 per person.