Need Help What Do I Do With These? And Are They Worth Anything?

I have a bunch of these stamps and various others from the laten1800s to the early 1900s. Could somebody tell me about these two stamps? What makes them special how do I know if one of the others is more valuable?

try stampsmarter.com. both appear to be the workhorse issues of their time. a better photo of what you have would help.

Welcome.
Stamps like you show had production runs over many years and were issued in the millions/billions. There are some rare varieties which some collectors dream about finding, it is similar to dreaming about winning the mega lottery. Stamp collecting is a great hobby but not for investing or making money. If you persue the hobby and do it for learning about history and culture, you will be sure to be rewarded. If you do it in hopes of finding a rarity, you will always be disappointed.
You can learn much more about your stamps here http://stampsmarter.com/1847usa/1847Home.html
Don

The stamps are extremely common and worth a few pennies at best, however when on a complete mail piece such as an envelope or postcard with the cancel they can became "postal history". Please show a scan of the entire piece with the Buffalo / Pan American Exposition advertising cancel.

I agree with John. Seeing more of the cancels and markings may help determining if there is more value. So, these stamps should be left on cover or card, instead of removing them.