how much to pay for this sensational setup?

not an audiophile..just purchased a house with this setup and the owner wants to sell it off....what is this worth you think?

B&W 801 speakers (UK)
B&W ASW300 subwoofer(UK)
B&W DS6 centre speaker(UK)
Sony Blu ray player
Krell stereo amplifier (USA)
Marantz 8003 power and pre amplifiers
NAD2400 power amplifiers.
Krell speaker cables. (these are currently around $700/meter