Spring Mechanism Only
The advantage of the spring system is it's fast and simple to build. With this kit you receive not only the Spring lift system and legs, but you receive the frame as well. This saves you time because it isn't a component that you have to build. The mechanism is a little more expensive but that is because the frame is included.
The Original Murphy bed site sell hardware like this for $659. (see site) I have it starting at $499. That is a little more you can apply toward cost your lumber, right!
Alpha Mechanism Only
Steel Bed Frame and Spring Mechanism
Most Popular System
Easiest to build
Alpha Mechanism and Desk
Steel Bed Frame, Spring Mechanism and Desk
Add desk mechanism for $250 more
Desk stays level as it transistions into a bed.
Borads are not inculded.