your mother on 16 May 2007
Brand new? Nothing! I buy it to use it! 
But if you are talking about off-the-wall "stuff" I've accumulated over the years, I've got loads of them - especially controllers. That I must have several dozens lying from around from back in the NES days up to my latest Logitech MOMO Force steering wheel.
I also guess what's pretty rare are my collection of Famicom Twin games on disc, although they are also used...
