Some of you guys are getting carried away here. With a little know how and less than $100 you could put on Grover tuning machines, a new bone saddle, nut, and bridge pins and still have cash left over for strings and a Subway sandwich. I did this with my inexpensive Alvarez solid top. Look on ebay and you can find bone saddles pre compensated and radius, bone nuts pre slotted, and bridge pins of all different sizes. These upgrades are not rocket science.
Tools needed: Sandpaper, small Phillips screwdriver, possibly some welding tip files for nut slots
http://www.amazon.com/Hobart-770085-.../dp/B0017Z04Q2
Tuning machines $50
Bone saddle $11
Bone Pins $13
Bone nut $10
$84
Saddle Height by
Bohdan79, on Flickr
5/64 Action by
Bohdan79, on Flickr
B Stock Crew by
Bohdan79, on Flickr