New Here Please Help!

Hello! Im new here, help im confused! I just inherited over 1500 stamps half used other half are old but never used. I have some sheets some half sheets ect... I have first day issed envelopes one from 1949.
How do I do this selling stamps buisness?




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What I would do personally is to come here or go to a stamp fair get them valued and sell them here or eBay .
If you have any duplicates then you could sell them to stamp artists.

Unfortunately, "this stamp selling business" usually means getting pennies. Stamps such as those you've shown might sel in a job lot. Unused stamps - assuming they're US and from the last eighty years or so - will have more value if used to post letters than as collectable items.

Are these all U.S.? Most old stamps are a penny a piece in value and the mint stamps most likely best for postage or sell for 50% of face value. Are the FDC addressed or unaddressed? Even so they are 5¢-10¢ range and not in much demand.

Basic Tasks:
Separate the Used/Unused.
Separate by Country
Get in order - Date of Issue/Scott Number
Some Libraries have Scott catalogs you can use for FREE.
Remember that getting Catalog Value for common stamps won't happen. USA this side of the change to 3 cent stamps will mean you're lucky to get Face Value. ( 3 cents = 3 cents )
Common First Day cancels sell 4 for a dollar, or less.
If the subject of the stamp is not common, neither will be the interest. I've had Marilyn Monroe FDoI Ceremony Program for sale on eBay for a Year or so...

Selling on eBay or other sites means OVERHEAD COSTS! eBay + Paypal take their cut first, Shipping/Handling/Insurance/Tracking/Ect costs are placed on the Seller. If you have to add these costs to the price your asking for whatever stamps you're trying to sell, you won't make much money.
The time and effort it takes to create a valid eBay lot may be quite a bit, especially if you're not familiar.

With all this in mind, Good Luck.