Question on used floor tiles

[FSogol]

Here's the background

A client want to sell her house, guts the kitchen and installs an expensive, thicker-than- normal ceramic tile that looks like white stone.
Her crummy contractor uses some form of adhesive on the bottom, lets it dry and put grout between them.
4 weeks later, the tile all comes up since the adhesive is not the proper stuff to set the tile in.
The client has it removed and installs a new floor with new tiles properly.
I inherit 250 sq feet of nice tile that was installed and removed. The tile is not broken, the adhesive flakes off of the back with no problem.

My question is about the grout on the edges. Can I remove it? Would it be easy to remove?
Would the tile still be useful? Could it still be installed for a floor if done properly?
Or is it best to send to the dump? (Thicker than normal, but probably wouldn't survive winters to place it outside).

TIA.