Bundled or not?

http://www.steamgifts.com/bundle-games

Also, here for any new additions to the list.

some games aren't added to the bundle list immediately.
use ehnanced steam, you can check region and lowest prices. (~95% off = bundled)

View attached image.

You'd be a lot better off if you consider every game bundled. After all, with the way the ruble is dropping and the bundle list fattening, it is only a question of time now.

Pretty much what Talgaby said.

Only games that are "safe" are the newest games....to some extent and that doesn't always last long depending on the game and circumstances. But between everything getting bundled, big sales events, competitive pricing through online stores that sell steam keys (GMG, Kinguin, HB, etc....), and the widely varying prices of the different Steam storefronts worldwide, might as well go about the thinking that everything is bundled, because if it isn't on the list yet, just give it time and it will be.

Edit: also, Mullins mentions Enhanced Steam; it's a Chrome extension (no idea if it is IE or FF also). Get that. It uses this site, and they do their best to keep prices, deals, and info up to date. Also bookmark the page to check out once in a while if you like watching for bundles or deals and when they expire.