Reinstalling deleted apps
 

I just bought my wife and I 8120's they are awesome!
I'm looking to sell my 8100 and 7105t on eBay and would like to provide the buyer with a "brand new" OS. I tend to delete all apps I don't ever use (IM, Tasks, etc.) and as I recall, if I reinstall the OS they don't show up again on the device and all third party apps are deleted. How do I reinstall everything clean again?

The easiest way is to delete the 3rd party apps from the list of Applications in Options >Advanced Options >Applications.

Then go to Options >Secuity Options >General Settings >Menu Key >Wipe Handheld.

Good as new.

to reinstall memos/tasks/etc that you removed from the stock OS, just go into the desktop manager > app loader > and check the boxes for the apps that you removed. then hit next and it will install them. (provided that you have an OS installed on your PC)

None of my apps show up in the DM. I just updated the DM when I upgraded to the 8120. From what I am gathering, I need to install the OS for each device on my PC, then it should show up in the app loader?

Yes, install the OS for the device.