If you honestly enjoy restoring it and working on the machine; then resale opportunities or value arent as important. Restore it, have fun with it, then sell it when/IF you feel you dont play it anymore. MM and AFM play very similar so it usually comes down to what theme/art/music you like more. AFM for me all the way... MM didnt last 2 months in my collection after it was restored.
Heres the pics on my personal AFM restoration:
http://www.flickr.com/photos/r3zon8/sets/72157606911901091/
The green saucers are my favorite!