If you don't take the word appliance, too literally then you could get him a gadget of some kind. Almost all men like gadgets... a PSP could be an appliance and I'm sure he'd be happy with something along those lines.
Are you sure this is a good idea tho? After all, are you going to be happy with a toaster or iron for your anniversary?
Play safe and tell him chocolates, champagne and flowers are anniversary appliances.
Have a lovely anniversary when it comes round.
Flo x