PS 4 what could be new resell rate after PS 5 launch?

I have noticed that PS 5 is on fire and it will pretty much reduce the sell of the old console. And that makes you wonder if you can sell your old console now a days. I think the PS 4 is one of the sold platforms from the past. I wonder if there are any collectors who could buy the console that we sell on ebay or craiglist.

Do you think there would be some resell value of the PS 4 console after launch of PS 5?

My thinking is that the new PS4 shouldn’t cost more than $240.

If I could look into the future, I would say the new price for PS4 would be $225