To give you an indication of the prices, I have converted the US.Dollar price to Euro's ( € ), and British Pounds ( £ ),  # You must take into account additional costs such as Import duties, Taxes ( VAT ) and Shipping costs.

MayFly MF - 201 A - € 4.405,-  #  £ 3.679,-  #  $ 4.900,- ( p.pair ) The World's first loudspeaker with Internal Skyline diffusing

MayFly Stands - € 808,-  #  £ 675,-  #  $ 899,-  ( p.pair )

An excellent recording to judge soundstage width is Steely Dan's "Hey Nineteen".

MayFly MF - 301 Deep Bass Modules - € 8.988,-  #  £ 7.505,-  #  $ 10.000,-  ( p.pair )