Many times since SB?! Care to share examples?
Do you seriously think the 2600k’s price plummeted as a result of the release of the 3770K? It didn’t and even as recently as 2017, the 2600k was still selling for a healthy amount on eBay. Heck, used ones are still going for $100-$200. A 2600k is nearly an 8 year-old processor!
Repeat the same question when Haswell was released. Keep on moving through the years - do you think the 7700K’s price plummeted when the 8700K was released? This was arguably the largest change in Intel’s consumer lineup since Nehalem or Sandy Bridge.
Let’s consider the primary market for a moment - why don’t you head over to Amazon and tell us how the 7700K is selling (hint: it is ranked #11th in CPU sales), and the current price of the 7700K and 8700K. Heck, I’ll save you the trouble - the 7700K is selling for $355 and the 8700K is $370. And unless I missed it in the list (entirely possible), the 7700K seems to be outselling the 8700K on Amazon. If you want your eyes opened even wider, keep scrolling down that list to #19 and tell us which CPU it is and how much it is selling for in 2018. Oh, what the heck, I’ll spill the beans there too - #19 is the $315 i7-6700K, which was released in 2015.
And yes, I know you’re talking second hand - go look on eBay for 7700ks. I’m seeing many used ones selling THIS MONTH for over $300. That is for a processor released nearly 2 years ago. Ebay also shows used 6700ks commonly going between $200 and $300. That’s for a 3.5 year-old CPU. I found several used 8700ks on eBay which sold for under $300 - yes, some sold for more as well. So yes, there are PLENTY of examples of CPUs since Sandy Bridge holding their values. The fact people are paying $300 for a used 7700k is amazing to me. I do think the quad i7s should start plummeting any time now, but it is amazing how they’ve held their value.