You should be asking Adobe, not use....

But with the subscription you are allowed to install it on up to three computers, but only use it on one at a time.

Personally I wouldn't bother installing Photoshop on a laptop. They just aren't that great for image editing and optimization to a high degree, such as PS is used for. To finish images to a high level, it's much better to use desktop with a calibrated monitor in in a fixed location (where lighting is controlled and consistent).

I have Lightroom installed on both desktop and laptop. But I have Photoshop installed only on my desktop.

Thanks again, rcdovala. You did a service to this forum.

And a resolution to those who would like to have only positive discussion about even overpriced items such as this one: Only PMs should be allowed by the forum administrator. No one discussing items for sale. Otherwise, terrific participants such as rcdovala will come in a try to serve the entire forum, seller, buyer and all. How does he serve the seller ~ Well, he kind of told the seller how everyone in a forum of such savvy people would never buy what he is selling, including all those big walleted Hogs defended his pricing. They did not buy it, noooo, they just told everyone else how much of a great deal it is.

Come on, Hogs.

If you feel it was none of rcdovala's business to say what he said, how is it any of your business to say what you just said?

In sales, what rcdovola did, was to present an objection. The job of a salesperson is to overcome such objections. You did a fine job of overcoming the objection for whomever might be a prospective buyer -- up until the point where you decided to insult another Hog. Up to that point, what you wrote may be just what a buyer needs to hear to spend the money for the one here for sale. But rcdovola did a fine job of bringing up an objection. That's how this works.

No. You have not been appointed as the arbiter as to what is a “fair” price, and you may not know all the facts. The seller has zero obligation to provide comparative pricing, only to represent the item for sale honestly. It’s not your listing, it’s none of your business, and you’re presumptuous in believing potential buyers can’t look up prices on their own. You’re not “exposing” some unethical dealings, you’re butting into a transaction that’s not yours, and that is really bad form.

Let me give you an example you may be able to relate to. You’re selling your house. You or your realtor are having an open house, and someone who you don’t know and has no interest in buying your house shows up while you’re showing it to potential buyers and posts a sign in your yard listing all the competitive houses in the neighborhood that are lower in price per square foot. Now do you get it?

There is an area called "newspaper rock" in the needles district of Canyonlands national park. Apparently the intent of the carvings was to announce upcoming trade meetings between the different tribes. Today you have 24/365 news channels, newspapers,(real ones), snapchat, twitter,facebook,etal.
I think the intent of those people was to communicate important information to each other. I agree with the OP defining this current activity as defacement, as in look at me. There are so many ways to communicate today you certainly do not need to carve crap into trees for your own self aggrandizement.