How Is This Process Done ?

I don't think so they were all sold on ebay,some how they were doctored .
Can I put the before and after price .

Their lot of fraud going on ebay.

Someone is going to be awful displeased when they get the note in the first picture after using the photoshopped picture to determine a bid.

Plus whoever paid $200 for it to begin with, overpaid.

These are not Photoshop,somehow they are altered .I can post over 2000 notes that sold like this on ebay.If they were Photoshop every one would get their money back makes no sense.

This is a restoration of a missing piece. Not a very good one as most anyone that can grade can see what was done.
Bill Collector

Maybe, maybe not.
Some restorations cost more than others.
And it also depends on who does the work. If the person doing the work is a real professional such as a museum document restorer, they don't come cheap. On the other hand if it's just someone learning the paper or document restoration trade they can come a lot cheaper, of course the work most likely will not be on a par with a real pro and many times it's easy to see that it's been messed with.

It looks like your $ 2.00 note had a bad burn mark on the right side, it can be very difficult to "fix" things like
that and it's costly.
Bill Collector

Much of the restoration work that I have seen is done shoddily and I think ruins the collectability of the items in the marketplace today. Some of these notes are easy enough to "enhance" by washing the notes and then pressing them out to give them a more pleasing appearance. Other stuff like fixing holes is often times done with a paper mache like substance and then the design is redrawn. There is nothing about this that I would term as "conserving" a note, you are IMO ruining the note as you have put a shoddy foreign substance on it and redrawn it - most likely in an attempt to deceive. These notes then float out into the marketplace with inflated values when in fact they are only worth a fraction of the value they trade at.

Unfortunately, you won't be seeing the end of this kind of stuff anytime soon as the values that you can gain from doing restoration work are amazing. I have seen a dingy looking XF bison with deep folds magically transformed into a beautiful 45 PPQ with light folds, bright white paper, and lots of "eye appeal." That was about a $1,000 worth of value gained because someone knew what they were doing to enhance the look of the note, and truthfully unless you saw the before picture, you would never know. Some stuff, like low end VFs and lower you can tell has been tampered with, because nothing with that much show of circulation could possibly be that white, but the market will still pay a premium on it because it looks nice.