So I am wanting to upgrade from le to le4. I already tried getting a copy from Tascam with no luck (tascam 122 user). So here are my thoughts. Any input, suggestion, comments would be appreciated. If it is previously used will I be able to register and use it on a different computer?
1. Buy LE4 on Ebay for about $50.
2. Buy a yamaha midi controller (Something I kind of want, but don't really need) for$150 to $200. Bundled with Cubase AI4 - appears to be the same as LE4???/
3. Buy Cubase Essential for $150.
4. Buy Cubase Studio used for $150.
5.
See if anyone on here has one they are not using that they would want to hook me up with. 
any other ideas??