If we are going throughout the whole household... I think I win!
PS2
2 x PSP
2 x PS3
2 x SE phones (though I am going to sell one)
Stereo system
Sony Bravia TV
Sony Vaio Laptop
2 x Sony Cybershot Camera
{3 x Sony USB Memory stick}
{Alot of Sony Memory Cards (duos and micros)}
If we include old stuff, then there are probably 3 stereos and another laptop
EDIT: and a few old Sony walkmans, and I have sold a PSP, PS1 and 3 SE phones