For that Target drop.....here's a good way to figure out how much PS5/Xbox stock a store has (requires driving around though):
Go to the Target's you're most likely to pick up orders from.
Find one of those price-check scanners in the store.
Enter the TCIN number on the scanner keypad (PS5 = 81114595)
The scanner will show the PS5 and tell you how many are "in the back" at your store.
For comparisons sake, I have 2 Target stores within a 1.2 mile radius of my house. The closest store had only 6 PS5's on launch day.
Today.......the store that only had 6 on launch day has 10 PS5's in the back right now.