How much would all the electrons in, say, the Statue of Liberty weigh?

I know that electrons are very, very light - nearly weightless - and I also know that you couldn't really 'weight' them in the traditional sense of putting them on a scale (maybe I should ask what the mass would be).

But, that being said, if you were able to take all the electrons from some large structure - like the Statue of Liberty - how much would they 'weigh'? Are we talking pounds? ounces? tons?