The first thing you should buy before cards are supplies! You might be able to get them cheaper at card shows, but I would suggest just ordering them online. Here are the links to the supplies I have purchased before.
Top Loaders – Standard – 3″ x 4″ – You need to keep your cards protected and you will need top loaders . This gives you 200 standard thickness top loaders and it also comes with 200 penny sleeves. This is the first thing I bought once I realized I didn’t have anything to protect my cards. Click Here to Purchase.
Penny Sleeves – All cards that go in top loaders should be in penny sleeves. If you just need more penny sleeves these are the cheapest I have seen online. Click Here to Purchase
Boxes – When you starting opening wax boxes, you will have a lot of commons. You will need a large box to put these in to keep them protected. Also, so you can hide them from your significant other. The box can hold up to 5000 cards. Click Here to Purchase.
Need a box to hold your graded cards? This is the box I purchased. It hold about 75-80 graded cards, alittle less if they are all Beckett. Click Here to Purchase and if the next link gives you 3 boxes for the same price, I just haven’t used them but it looks like a great deal Click Here to Purchase
If you are looking for a box that can hold your top loaders this is a great box as well. It holds up to 675 cards in top loaders. This particular one comes with 3 boxes and it’s pretty cheap as well. Click Here to Purchase.
If you are looking to sell sets you are going to need smaller boxes that you can ship them in. There are 400 count boxes you can get for $5, but this link gives you a bundle of 50 for less than a $1 per box. Click Here to Purchase.
Their are plenty of resources online that you can utilize for free to make informed decisions.
Ebay – This is the marketplace for sports cards. Enough said.
Cardboard Connection – This let’s you know when new cards are released and what they will look like. Also, will give you checklists. This should be your main spot to find information about baseball cards.
PSA Card – Here you can check the population and latest auction prices of PSA graded cards.
PSA Forum – This is a great place to chat, buy, and sell cards. You will need to sign-up but it’s all free.
PWCC Market Price Research – You can check the sold listings on ebay all the way back to 2004. A great way to check your investments.
Blowout Forums – This is a great place where a ton of knowledge is shared. Great community. Sign-up and take advantage of this free knowledge.
PSA Card – https://www.psacard.com/ – They have been around along time and is the most popular grading service. They do both vintage and modern day cards.
Beckett Grading – https://www.beckett.com/grading – They are known for their price guides but now are just as popular as PSA with regards to grading. They are for modern day cards, I wouldn’t suggest vintage card grading thru Beckett.
SGC Grading – https://gosgc.com/ – They are an excellent grading service for vintage cards.
Sirius Sports Auction – I believe this is the Number 1 auction house on the internet. 15% buyers premium to boot. Constantly have auctions.
The following I have signed up for but never bought from:
There are plenty more but I haven’t checked them out or they seem to expensive.