Out of luck unfrotumenatly. Kinguin used the ''cheapest'' option about 9 mounths ago which is where i bought it discounted at about 61 euros thanks to a discount coupon, but it seems the price has been recently increased everywhere so you are better off waiting for the remasters to get officialy announced eventually.

Looks like there's no way to get it for a good price in 2024. Only hope is to know someone who owns it and use their account to play or pay the insane prices people are selling it for. Crazy that I bought it on amazon 2 years ago for 50 dollars and still thought that price was outrageous.

well it just got out of stock like 2 months ago in amazon. it was 50 dollars there.
your cheapest option is steam gifts.
https://www.inventory.gift/gifts/Transformers%3A%20Fall%20of%20Cybertron?s
cheapest offer is 100 dollars here. you might wanna contact him, and even if i bought the gift i probably wont active it cuz the prices will increase after some time and i could sell it for a really good profit.