I assume these will work on recent Dells but I am not sure, I just decided to give it a shot at selling here since I use other operating systems
I have a Vista Basic for £30 and a Vista Home Premium for £40
You will receive the OEM sticker (Pulled from top of machine, I can get them off pretty well!), Windows Vista case sticker and the Dell Vista install CD (This is a clean Vista installation with no Dell bloatware).
Like I said I am not sure on which Dells these licenses will activate and which will not, but someone might know!