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1. What makes a stamp collectible?
If somebody likes it. Or the cancel as I am a cancel appreciator. The more you learn about stamps the more condition enters into the valuing equation. Except for cancels.
I, just me now, look at cancels first and then notice things about the stamp later. I have bought a stamp for it's nice cancel (or part of) and later saw that the stamp itself was damaged.
Some people can pay big bucks for the stamp that they like, that fits into their topical or thematic collection, or completes a set, or, heck, looks like their pet dog or cat. Really.
But mostly it's the condition and rarity as was mentioned. New with gum, post office fresh, mint, no gum disturbance, are the most expensive as usually, for older stamps, they are the rarest. I'd rather have used myself but that's just me.
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How do stamp collectors "know" what is out there
We have general catalogues of the world divided into countries and specialized catalogues of each country and sometimes era's or reigns of monarchs or even stamps. Numbered from 1 to way up there.
Different general catalogues number things slightly differently too. US is mostly Scott catalogue (in a library near you), comes in 6 or 7 volumes for worldwide or one US specialized. Pricing is contributed by dealers. I know, I know, but the internet is a great leveler.
Usually priced Mint (with a percentage premium for never hinged) (hinges are any little extra piece of paper used to attach the stamp to a page), used and on cover, with all of these divided into grades from good enough to superb with some having a 100 point rating system thrown in (yuk).
Oh, generally there are a domestic rate denominated stamp, a close countries rated stamp and an international or everyone else rated stamp for most countries. Older (pre 1940 usually) stamps are mostly this way with extra ones thrown in for extra weight sent or extra services like registered or special delivery rates, etc.
Modern stamps are seemingly more and more for every country printed up to meet the collecting market's demand and then some.
First Day of Issue covers (FDC), souvenir and mini sheets, etc etc are made and sold.
There are around 400,000 different stamps in the world and counting.
You mostly have to restrain yourself to certain countries or areas or years (early) or topical collections here and there.
Maybe only covers or cancels.
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3. Can some of these be "cleaned up" somehow - I know cleaning most collectables only degrades them.
Most stamps, used ones that is, can benefit from a soaking in warm water and a bit of mild detergent. After that it is a tricky matter as any chemicals used can 'clean' but also ruin a stamp.
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4. Are there any here that, if they were in good enough shape (whatever that means!) they would be a more sought after stamp?
I thought some of them looked kind of interesting but I'm a newbie at US stamps really. The more sought after ones are the ones that were not printed in as great a quantity, and for yours, that means the odd rate stamps, made for those odd things like over-sized envelopes or the extra rates or services.
The rates change every year now but stayed the same for years in that era.
Google postal rates.
1c, 2c, 3c stamps are the more common ones (but still have varieties and special printings) with the 4c, 5c being international and rarer and more than that being even rarer usually. But, since people mailed a lot back then, they usually are not that rare.
Different eras, different rates remember.
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5. Why do I feel like I am getting in deeper than I dare get right now?
You are a collector and see how stamps can enrich your life and you feel how lonely you are without them.


The three main words in stamp collecting are condition, condition and condition. After that it's all pretty pictures.