FREE UPGRADE! Happens when they run out sometimes. You can check system info to see what exact CPU is installed.

Dell did that to me once, and it had some thicc paste under it lol.

3600 was $150 regularly at microcenter. Later, the 5k/5600x came out, was in short supply, and the hype from the better performing 5k series got the prices on 3k to go up lol. Soon after, the 3600 went back up to $200.

I ended up doing a bunch of 9700k builds because they were on sale for $200 at MC. Better for gaming than the 3k series.