Jump into the sales thread every other Friday at 2 p.m. CST / 3 p.m. EST in the Fixed Blades for Sale by Maker subforum. Check the pinned posts in the CPK subforum, as Nathan always posts ahead of time of when the next sale will be.
Most people in the feeding frenzy are chasing the DEK1, as demand is still far outstripping supply on that one, even with a huge preorder done.
Since you're looking for (presumably) an FK2, even if you aren't one of the fastest fingers/fastest internet people, just post that you want an FK2 and what configuration you want, and Jo will probably message you within a few days later to confirm and invoice for it. Jo and Nathan have been big in the last few months about being willing to sell knives they have even if you don't make it into the top 20 posts. Basically the top 20 posts are competitive, but... if you want to buy something that people aren't really competing for, you can pretty much just get it.