You see, I know that I have joint issues but I attempted to defy all of my impairments.  So, during my second week of jogging when I increased my jogging sprints from 60 to 90 seconds - my knees were less than pleased.  I did decide on week three to take it back to 60 seconds but the damage was done and so I gave myself 2 weeks to heal before I took it up with my doctor and now...well, simply walking or even sitting with my knees attached to my body causes sporadic pain.  So, I quit.  Yep, I am a quitter.  
That being said, I discussed it briefly with my orthopedic surgeon who basically looked at me and said "Some of us just can't jog."    That is his professional advice.  So, because I still want to do something I am pondering an elliptical.  
My budget is very limited right now.  I have exactly $0 to spend on one.  If anyone is giving away an elliptical... will it fit in my minivan?
 
