Not having any of this, I'll echo - keep them, at least, for another year. Yes, they are semi-auto only, which is not good for all occasions. Though they are good for any other situation when one doesn't care about speed. Automation may be bad, and automation can be good.
If you need money, let's face it - they are not THAT valuable (when you sell; for buyer they can seem pricey, especially GL) to make big difference.
If you hate not using gear, well, I can understand it - take them out of cupboard once a week, make some filmless shots and put away. Once you sell them, after month or two you will need exactly GL or GX.