But, Silicon Lottery is happily shipping out Intel Core i5-10600K's for $290 after testing their overclocking capabilities. Sure, that's still above MSRP, but you're getting a tested chip that likely runs better than one off Amazon or NewEgg for less money. Seems like a win-win if you ask me.
The $290 ones absolutely won't run better than those off Amazon or Newegg, and chances are they will be worse. Sure, they have been "binned", but that in itself is not a good thing if they've been binned as being among the worst performing chips. According to Silicon Lottery's own numbers posted in this article, 88% of the chips they tested overclocked better than those in this bracket, meaning that the ones selling for $290 are guaranteed to be among the 12% worst performers. And since halfway through that bracket will be the average performance of processors in this tier, that means that on average, there should be about a 94% chance that a random processor bought at retail will overclock better.
And the $295 ones are in the bottom 27% according to them, which is still well below average, and not much better. Again, if you were to buy one at random for the same price on Newegg, there should be around an 80% chance that you will get a better performer than one of those. These two lower tiers are both guaranteed to perform below average, and should really only be worth considering if they are priced lower than other retailers, for those who don't care about overclocking.
The $300 "4.9GHz" tier is the bare minimum you would want to pay to get an average performing chip from their site. It guarantees that you won't get one of the best performers, but also that you won't get one of the worst performers, eliminating the gamble, with the chances of getting a chip that performs better or worse at retail being about equal. It's arguably not worth paying a premium for that, but I guess if one only cares about cutting out the possibility of ending up with one of the worst chips, the option might potentially be worth the current small difference over what other stores are currently selling the processor for.
The only tiers that are guaranteed to run better than average are the top two, and that's why they are being sold for more of a premium. Though unless one is really striving for slightly better per-core performance, and doesn't care at all about heavily-multithreaded performance, they would probably be better off going with an i7-10700K than a top-tier 10600K, or maybe a 3900X if heavily-multithreaded performance is more of a concern. And even around $300 seems a bit much when the 8-core, 16-thread 3700X can be had for around $260, and when there are decent-performing 6-core, 12-thread chips like the 3600 for under $175. If one is building a gaming system, that extra $125+ would probably be better put toward graphics hardware instead.