The original reply made mention of buying it at another vendor...that was the old ACA500. The ACA500+ is ONLY sold through icomp.de (the manufacturer), and, it's much improved over the ACA500, in my opinion.
Also, keep in mind that the prices on icomp are in Euros, and, include VAT taxes. Once you make a login and put in your proper address info, including USA as your country, the VAT gets deducted from the price, since there is no VAT here.