I mean no offense but that's a rough looking HUO machine. You should add pictures of the playfield without the glass on so folks can get a better idea as to the condition of the playfield. Also, add some pictures of the inside of the cabinet and backbox, especially of the boards.
Do you have a receipt that shows the machine was purchased new? If so, add a picture of it as well (be sure to black out any personal info).
Lastly, have you ever changed the battery in the machine?
Just a few things to try and help ya sell the machine since I see you're new to Pinside.
Good luck!