The short answer is yes.
Libre Wave software is released under the GNU GPL giving you the freedom to resell and distribute your copy of the software or modified versions if you make any. The audio files/samples are released under a non-commercial license so technically you can’t sell these. However you may give them to another individual. The non-commercial clause is included to prevent commercial mass redistribution of the unmodified audio files.
Please read the full license that came with the software to find out all of the small details.
If you’d like to transfer a product entirely from your Libre Wave account to another user, including download links and future updates, please provide me with their name and email address, and specify the product you are transferring. I’ll set up a Libre Wave account for the new user if they don’t already have one and transfer the product from your account to theirs.
If you need further information please contact me.