Cancels, Postmarks, and Obliterations (Stamp Collecting)

What is a postage stamp? Why are they cancelled? Are cancelled stamps more valuable?
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[@henrys3629]

I collect California postmarks and got RTS from several operating post offices. What a pain. Also I have around 100 postmark requests that were not returned or useless machine cancels from Calif and Washington. I'm working from a checklist.

[@StampCatStamps]

Thanks for another great video - that's crazy to think the cost of a penny black stamp was equivalent to half an hour of work wages!? Puts things into perspective

[@peterconrad2277]

Nice video Bob, thank you.

[@blulagoon21]

Great informative video. Thanks !

[@celiareno1479]

Informative and helpful! Thanks!

[@destinypotato8417]

Thanks Bob for the informative video

[@dougwilson8364]

Hi Bob, Thank you for taking the time to make these informative videos. I appreciate it!

[@Creek54]

I received a pack of 100 space/planet stamps which were all CTOs. It was easy to tell that the countries were looking for easy income. The $7 packet is probably worth 70 cents. I prefer stamps that at least had a chance to be on a letter.

[@tgkstamps]

Nice!

[@Robertbrown08049]

You did not mention pen cancels. Ugh!

[@peterconrad2277]

Pen cancels are the worst, You should watch Graham Beck's Exploring Stamps channel, he does a deep dive into pen cancels and also brings them up in a similar video about postmarks and cancels. Really worth a watch, I learned a lot.

[@Robertbrown08049]

@@peterconrad2277 Will do. Thanks

[@BobCollectsStamps]

To be honest, I couldn't find my pen cancelled stamps and get them scanned before I made this video. But Part II that should be out 4/5 will include them, along with some other things. Thanks for the comment.

[@AliSOROUR-yf7er]

Thank you, you're awesome Question please... What are the stamps made of red mercury?