Assuming one exported the private keys from one's offline Electrum wallet to a CSV file (also offline), they obviously have not been 'spent'. The whole thing was done offline. My question is this: if I were now to go online and try to spend the bitcoins covered by those private keys, are the bitcoins still there? Or does the exportation of the private keys to the CSV file equal the spending of those coins so far as the Electrum client is concerned? To put it another way, can the private keys be exported more than once so long as they have not been spent? I'm hope I'm explaining myself clearly.
[I recently made my first Bitcoin purchase and I did so into an Electrum wallet, which I am currently keeping on an offline computer. I could not see my private keys anywhere and was unsure that I'd received them and so I exported them to the CSV file purely to ascertain that I had, in fact, received them. (I would not do so on any future purchases, now that I'm confident that the private keys would be there to be generated from the seed since they are plainly more secure unexported from an encrypted wallet than on a CSV file, but, hey, my first time and no evidence or explanation that I indeed had received them ...] - Terrylei