Upload & Sell: On
I find B&W conversions to be very difficult. I am certainly not going to try to improve on this; however, I like to see some pure blacks, pure whites and mostly midtones. This seems just a bit harsh and I would like to see more midtones. Printing B&W files is a major pain. Most printers and printing services seem to struggle with getting decent tones. I would guess this will appear even more contrasty and harsher when printed.
Finally, I think this is an ok image, but nothing special. If it was mine, I would probably just leave it in my achives with my hundreds of other not so special cactus images.