Can You Mail With Old Cancelled Stamps On Cover Also?

1. I received a large envelope with 34 vintage stamps on it. It looks great with all the old postage so I was curious, can I use it again? Can I take it to the P.O. and leave the old stamps and have them print out correct postage paid sticker and put it on there also?
2. I guess this is one answers on what I can do with my old below face value sheets. I purchased a sheet of the Boston Tea Party stamps with the matching block # in the same position to use for comparrison. That was Thursday. On Friday I received it. There were 30 vintage 4 cent stamps from a sheet, 3 vintage 3 cent and 1 vintage 8 cent + a new printed out Postage Paid sticker for an additional 13 cents. All the stamps are cancelled the same day and the envelope was mailed from 40 miles away. I probably would have received it next day or 2 anyway. He must have over nighted it at $12.30? I think I paid less than $6 for the sheet and didn't ask for it next day. My guess is that he has tons of these old sheets and just just them to get rid of them?

1. Postally cancelled stamps? One word answer: No.
Uncancelled/unobliterated stamps that travelled -carried mail? According to the USPS regulations: No again.
Have people tried. If caught -- it's called Mail Fraud.

---this is taken directly from a Postal Bulletin ~~~

WARNING![

Once a postage stamp has been used, it is a Federal crime to:
1. Remove, attempt to remove, or assist to remove cancellation marks from postage.
2. Reuse a stamp whether cancelled or not.
If you have questions concerning the reuse of postage, please contact your local Postal Inspector.
Title 18, U.S. Code, Sections 471 and 1720

~~~

My advise: DO NOT ATTEMPT TO RE-USE STAMPS.

Frederal Crime = Federal Prison

As for Question #2, I don't understand the question.

I'm pretty sure you can add new postage to a cover that has cancelled stamps on it. May raise an eyebrow but as long as it has the new amount you should be OK. However it may not be worth the potential aggrevation and there really is no collector incentive.

"There were 30 vintage 4 cent stamps from a sheet, 3 vintage 3 cent and 1 vintage 8 cent + a new printed out Postage Paid sticker for an additional 13 cents."

This adds up to $1.50 -- where do you get $12.30??

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I use huge quantities of small denominations. The ship covers I'm mailing right now have two old 21c airmails, one 24c Americana plate single, and a 5c plate block. That's a total of 86 cents, the proper rate for a 2 ounce non-machinable letter.

SORRY!
IF I had ever done drugs, I would blame it on that but for now it might be the 60 - 80 hour work weeks. Again I am sorry.
Just trying to survive.

Here are typical parcels I send to Australia.

Sounds like more like you need some... or maybe I do... I only had three hours sleep last night.