All I do is right click my photo and then click edit, I resize to usually 450 top # and then the other # automatically resizes.
I don't know why you would have to load to photobucket first to edit when most computers come standard with a basic editor.
Yes it can be a pain to have to resize photos before posting on auction but their system can only allow under 99 kb (or mb or whatever it is).
Once you have the photos resized and saved you won't have to do it again. Also, once you post something to the auction when you want to relist it you just click quick list or another option and all the info and photo is still there. After 2 months you will have to reload a photo if you still have more of it to list though.
Once you get the hang of the auction it gets easier.