Michael - not wanting to seem unhelpful, but the plates are only worth what someone wants to pay.
D8UEY - is of great interest to the Registration Dealers as it is DaVEY. A personal favourite.
TRD 904 - that speaks for itself, I think you will find TRD 900 for £2995 via NewReg, they are also representing mine by mistake.
436 GVT - is a nice bhp plate for someone with GVT as their initials and they will get a free Jag XJ6 in the deal. It is also a bit unique as a dateless registration.
D4V GT - will most likley be sold within the Porsche Post for a GT2 and GT3 driver called Dave. But I wanted to offer it first here.
I guess there are a lot of plates on ebay if you just wanted to mask the age of your car, that is where i bought the OIL plate from, otherwise I check my PM's daily.