Topps is kinda the "old guard." They're still generally the most approachable from a young person's standpoint; the basic set is relatively inexpensive and easy to find (everywhere from hobby stores to Target). As far as online sources go, I'm a member of The Bench, which is a baseball card discussion board where we do a pretty good deal of trading (I've been a member for a year, and I've made almost 200 trades). I've picked up a lot of cards that way, both Metly and not. My advice for new collectors would be to pick something and stick with it. There is an enormous amount of variety, both price-wise and idea-wise, in the market right now. I collect three things: cards of my favorite players (Kevin McReynolds, Keith Hernandez, Pete Harnisch, Wright and Reyes), Topps base sets (1976 - my birth year, 1980-88 - the years I was a big-time collector as a kid, and 2006+), and Mets Topps cards, as a fun history-type project to build with Miniwolf some day. I'd advise her to do the same. If she wants Mets cards, tell her to go for it; eBay is a good start, as I've picked up a lot of things there also. If she needs help, shoot me an e-mail or a PM and I'll help her out. She can use me as a reference on the Bench if she'd like. (I don't know how old she is; there are a good number of kids on the board, but not really anyone younger than high-school age.) I'd also advise her to register at beckett.com -- they have a free "My Collection" tool where she can catalog what she has, and she can easily see the values of her collection. If she wants to pay, she can get the full online price guide, but I don't know that it's worth it; you can generally figure out what you need from the My Collections pages. (It'll give you the total value of each folder, but not individual values -- but if you move cards around between folders, it's really easy to see the value of one card if it's in a folder by itself, or if you move it out of a folder, you can just do the quick math to figure out the difference in the price of the total folder.) As far as storage, I keep my sets and my player collections in binders, and my extra cards that I use for trading in 800-count boxes. Storage can actually get pricey if you want it to, but you can pick up storage boxes cheaply at your local baseball card shop. I'm very willing to help if need be, or if you or she have specific questions. Let me know. My site is linked on my profile here, as well as at the Bench. edit: JD's right. There's no "correct" way to do it. Just tell her to do what she wants to do with them. My ten-year-old cousin collects, and has some relatively valuable cards (game-used relics, gold parallels, etc.) just jammed in with everything else. I cringe every time I see them, but ultimately, it's his collection, and he can do whatever he wants with it.