I wholeheartedly agree with the others....keep your "screwups" for use later on as you get better. I found (and continue to find out to this day) that as I increase whatever talent I have for making knives, that one of the aspects that I can now do that I couldn't do earlier is this: I can most of the time fix my screw ups. Now, don't get me wrong...I never sell one of my "seconds"..like Bladsmth said, selling anything but your best work is bad business. I looked into my screw up bucket the other day and found a Loveless style blade I had given up on about 15 years ago. In no time flat I had the grind lines straightened out & pretty'd up, and she was ready for handles. I got a curious sense of victory in the whole thing because I had beaten one of my worst demons with knifemaking for me...symmetric grind lines. It was hell with I began...no big deal now.
My 2 cents,
Hank