At £500, this kit seems to be listed for the going rate. If members are interested in buying complete Bose systems, may I please encourage you in my direction? I have plenty of complete Bose kits in stock, all of which have been checked by me and are known to be in good condition and fully working. I suspect I have retrofitted Bose more than anyone else and know the system inside out, meaning I'm probably a safer bet than unknown eBay sellers. Furthermore, for not much more than the asking price of this kit, I offer a supply-and-fit service. If you want Bose in your A2, please get in touch.
Cheers,
Tom