Hello sonalee....
Welcome to the club.....
Kim's advice is excellent.....I'm always impressed by her advice and the quality of information in her posts.
Yet.....I also think that if one were to search carefully as I have, there are incredible buys to be found on
ebay and other internet sites.
Case in point......I found this #7 on cover listed buy a seller that had well over 500 stamps listed by Scott number, yet this was listed as...."old cover, blue stamp"......with shipping, $10.00......I about gave myself whiplash hitting the buy it now option.


I'm sure most of you remember that I found a pair of #63c's in a mystery box (not on line) a fantastic once-in-a-lifetime find.......but so far this is my best find on line.
Half the fun is in the hunt.....with an occasional interesting find. 99% of all collectors never found anything decent, until the internet opened up the whole world for collectors to search. I think the odds of finding something of real value has risen dramatically in our favor.
Even so, I think it would be irresponsible to suggest that trying to buy stamps strictly as an investment is a good idea. The great majority are really not worth that much.