Would treated CD's or OOP's-hold its value later?

I suggest you do what I do: make copies on CD-R of the discs you want to treat, and do all the tweaking on the CD-R's.. Good CD-R's are cheap these days, and often a copy sounds better than the original does (if you use quality media and burn them with care).

Personally, I'd never do anything to an original CD except cleaning it. To answer your question: no, I would not want to buy a "treated" CD at all!

Nevillekapadia- If you haven't tried any of these CD tweaks, how do you know it's a 5% sound improvement. Suggest you give a Nespa Pro a try.

"Viridian/Qdrone/Shawn thanks for your insights. I will stick to no modification, as it's just not seem to be worth the extra 5% sound improvement."

Hi Kana,
The reason why I say it is a 5% improvement, as the dealer who used the cutting lathe, nespa pro'ed (30secs) the Cd and then used the Nanaotech fluid on his own Cd copy, of which I have the same, left it with me to audition over a few days. hence the comment on the 5% sound improvement.
On a revealing system like mine (IMO)*. I could comfortably say that the CD lathe flattened the sound- it went to a very 2 dimensional sound.
Then the Nanotech liquid brought the body back and the Nespa-Pro for 30 secs did not make much change.
the recording was a SACD of Ray Brown-Soular Energy (decent quality from the start) so there may have not been much to improve on.
*Avantgarde Duo Omega's speakers, EMM signature combo(CDSD/DCC2-SE) and Wavelength Napoleon's amps.

Osgorth thanks for your suggestion, but I struggle with time to listen. Let alone having to burn them to a CD-R as also suggested by the dealer of the tweaks.
At the moment due to my travels, I am acquiring more CD's than I can listen to. Nice position to be in as I feel I will one day get the time. Hopefully soon!
Neville

Nevillekapadia-

I've tried all of the CD tweaks you mention. IMO, they produce the greatest improvement with poor sounding CDs.

You have a very revealing system, you should check out the link below if you're interested in improving Redbook CD playback:

http://www.positive-feedback.com/Issue28/novaphysics_memoryplayer.htm