Hello Okonoko, welcome!
All great advice above.
I sell on
ebay and have looked at Delcampe and Wensy and BidStart but not having the strong motivation to sell that you might need to turn things into a good money making opportunity it is always seeming like a fun hobby rather than a business to me.
The good stuff sells and the so-so stuff (most stamps) pretty well only sells when you put it all together with with some good stuff in a lot. People like sets of stamps or covers. Of course having great selling skills helps a bit also. That changes the whole ball game.
The fraud and fakes and forgeries and repairs etc etc have been around forever and probably will continue to be around forever unfortunately. Learn what you can and keep learning as you go. There is always new stuff to learn. Don't let that stop you from using a market place that reaches a ton of collectors worldwide (mostly good, some so-so) (you can mostly tell after a while).
As to selling what you have, how much time do you have to do it in? If you have a long time or lots of time and are a super seller you are laughing. A shorter time period forces you to sell in big lots or chunks and perhaps not realize the money you have wished to realize from your investment. Good stuff should always be sold in small bits and drabs as Cjd says above, otherwise in a big lot you will sell everything for less.
Catalogues are on
ebay or online dealers or at stamp stores or shows.
You won't sell for catalogue value probably as these values are for excellent stamps in very fine condition, centering, gum, cancel, paper, etc and include a large part of a dealers time and overhead costs.
Look around on
ebay for the completed listings of stamps or on the other sites (Bidstart or Delcampe) to see what sells and more importantly how it is being sold.
All of the above has to be taken with a grain of salt and especially if you have expensive stamps $100's or $1000's each. Those kind require lots more specialized knowledge and also building customer trust and relationships.
With all that said, have fun and don't overwhelm yourself. Do stuff that you like first to get your feet wet and keep your spirits up.
After 50 posts on here you can buy and sell on here also (SCF) to members so keep that in mind too. Another basket for your eggs, er stamps.
Do I sound like I know what I am talking about? To me, no, I don't. I just talk a lot and repeat the wisdom of what I have learned and heard and read and hopefully taken in over the years. (the parts that haven't fallen out the other ear!).