It was fine Monday.
Had a hard time loading Wednesday, then kept listing the disc as “incorrect disc”.
Now, it cannot read the disc at all.
Canned air to clear the dust does not help.
I am correct in assuming that I have a dead DVD player?
I’ve gotten at least one CD player working again by using a CD laser lens cleaner (one of those discs that has the little brush bristles attached to it). If the OP already has one, I’d definitely recommend trying it. If not, trying to obtain one, or trying to clean the lens some other way, might or might not be worth it, compared to just giving up and buying a replacement player. (The OP specified that he did try cleaning with canned air.)
Since you are prepared to buy a replacement, nothing to lose.
It is surprisingly easy to clean and lubricate a CD or DVD player. Unplug the player. Remove any disc and then the cabinet top. Locate the laser sled that slides on the guide rod(s). See if it moves freely. Lightly lube the guide rod(s) with either light grease or even light oil (non-petroleum based is best). Slide the sled back and forth. Position the laser lens so you can clean it with a Q-tip. Use alcohol to clean the lens, but apply only light pressure. Do not use Windex or any other type of cleaner!
Re-assemble and give it a try. This usually fixes any fixable problem.
If you feel brave, you can leave the top off and try playing a disc. Sometimes the sled will hang up on the guide rod and you can gently coax it to go to its home position or to proceed further along the rod(s). If so, clean the rod(s) with alcohol and then lubricate them.
In my experience, this procedure will often extend the life of a player by several years.