Smarter still would be to sell it sans hard drive. Hard drives are cheap, and easy to install.
If the data was extremely confidential, yes, although very few people or even agencies can recover data that has been securely wiped, which was a suggestion from many on the thread, so it is kind of overkill for most people. Then a lot of buyers might be leering of purchasing that way, not understanding how easy it is to pick up a hard drive and install it.