In what appears to be a blatant effort to take advantage of people looking for a cheap version of Skyrim: Legendary Edition on PC (and qualifying for a ‘free’ upgrade to the Special Edition), Bethesda inflated the price ahead of the Steam sale.
Technically speaking, it was even more devious than that. Perhaps in an effort to avoid another run-in with the UK’s Advertising Standards Authority (which eventually cleared Bethesda of similar shenanigans with Wolfenstein: The New Order in the 2015 Steam summer sale), the version of Skyrim: Legendary Edition currently on sale through Steam is (semantically speaking) a different one.
The prior version, listed in this pricing database for $40.00 USD (some $25.00 cheaper than the present version) actually no longer exists on Steam. Bethesda’s current version of Skyrim: Legendary Edition is now a ‘bundle’ of the regular game and the individual DLCs, rather than a single title.
It’s exactly the same, content-wise, but it allows the publisher to re-list the game at an inflated price, and exploit those who want to get in on the Legendary Edition before the Special Edition update shows up. So, rather than the Legendary Edition being on sale for $15.00 (or possibly even less) as it has been in prior sales, it’ll instead cost you almost $27.00; and no doubt more in Europe.
All (probably) nice and legal, thanks to the “no no, it’s a bundle now” dodge. But all rather unpleasant from a customer’s point of view.