I've always wanted a cool mini gondola. I finally found one and it was $300!!! so i made one from parts i had lying around. this project with new parts would only cost about $30, plus if you have a lego train "controller" you can control the speed and direction very easily.
I had most of these things sitting around, so i dont know exactly how much they are.
a motor w/ a power source
garage door pulley
a bolt w/ nuts
springs (you probably don't absolutely need them)
3 small L brackets
a good place to mount it