A very nice user suggested that I sell upgrades for game cash to get more bang for my buck. I'm more than willing to do this but how is it done? Do I just add the users stable number into the slot instead of my own when making the purchase? Any help would be greatly appreciated! Thanks!

It states it in the upgrades and more section. It is like you're buying for yourself but you put their stable number instead of yours :)

Thank you so much! :)