Looking for steamgifts contributor value calculator

http://www.sgtools.info/real-cv

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

its all this you wanted? (:

As far as checking if things are bundled, you can search this page: https://www.steamgifts.com/bundle-games

Bundled Games List

Not always 100% up to date, but should do for your needs.

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

Note that games can be added to the bundle list retroactively. Generally speaking, if the game was bundled very recently there's a good chance it isn't on the bundle list yet, but that it will be added later - any GA created during that time will eventually be reduced in value.
If a game hasn't been bundled in the last few months, it's probably safe, but there have been a handful of very long retroactive bundlings

Thanks!