Keep in mind these values are from the Wine-Searcher site. A lot of the higher end bourbons I've looked at on there are either "showpiece" bottles (ones that shops keep on the shelf at ridiculous prices that they don't care if they ever sell because it looks good) or don't exist.
I had a Hirsch 20 stolen when my house was burglarized a few years ago. While my insurance adjuster was more than willing to pay for a bottle from a store or other provable retail establishment, it took me months to find one. Every store I tried to buy from on WS didn't actually have one, lol. I heard "yeah, that just sold this past week/month" at least 6 times. Bet you guys didn't know those $6k bottles of booze just fly off shelves, did ya?