Upload & Sell: Off
I love the simplicity of the images. No gimmicks, no props, no complex lighting techniques. I also love #1 (as you do) but also really love the warmth of #3. Not only the expression but I'm a fan of flaws in portraits (particularly in the elderly). They reveal character (well, they CAN).
Is there any vignetting on the top/left/bottom? Is seems a little heavy but perhaps that's natural fall off.
I would also disagree that these lack sufficient contrast. I find them to have pleasing shadows without excessive "pop." I would leave-as. Beautiful conversions.