Wow, cbd, $300 for a mint 1st edition Base Set? What a steal! The PSA 9’s just made that amazing 
I have three 
Here’s one that’s finished:
The best score I’ve gotten (that’s over) was when I went to a collectibles show about an hour from my house and a dealer there had a big box of older Pokemon theme decks - by old I mean WoTC. It was a steal on my part because they were all mildly damaged and what not and he just didn’t want to put them out to take up space so he let me take as many as I want for $3 a piece! I ended up with, I think (sorry it was like 5 years ago) 10 theme decks. I’m pretty sure I snagged some Gym decks as well as most of the Expedition series (base, skyride, and aquapolis) decks, and a few Neo. It was awesome
Here’s one that’s almost finished:
So I bought a really bad condition Rayquaza Gold Star on Ebay last year for like $28. The thing was super scuffed and scratched with silver showing in multiple spots throughout the card and a normal amount of edge wear and the front and back but no creases or anything. So when I got it, I had thrown it in a binder for my collection cause the card is so expensive.
Well, recently I decided the thing was too crap to keep so I put it up for trade on some forums. A lot of users decided the card was worth like $27, so everyone was trying to trade around equal value for it. I thought it was worth much more, so I eventually decided to just put it up on Ebay at auction starting at, I think, $30.
After 7 days, the card sold for $61.50!! I was super excited! But that’s not even the best part
Literally within an hour of my card ending, someone else threw up a Rayquaza Gold Star in excellent condition with a Buy It Now of $50. Well, using my newly acquired $61.50, I bought the card more-or-less instantly. The card has minor edge wear on the back, but the king of edge wear on the front where the it looks like it’s edged in silver, but all around the card (I guess it’s like peeling/curling). There are a few little specks of silver and small scratches here and there.
So, I pretty much got paid $10 to get a better condition Rayquaza Star
I’m leaning towards selling the card right now. I’m sure I can get over $100 for it seeing as my first one sold for $61.50. The only reason I would keep it thought is to avoid dropping $140+ on a NM/Mint one, but I know I will eventually because what’s a collection if the cards aren’t mint
And here’s one that is in the works of happening:
Okay so I found a dealer on Ebay who has hundred of POP 5 packs. He lives in Australia, so he is 13 hours ahead of me, which means midnight for me is 5 pm for him >.> So this deal is taking quite some time, and it doesn’t help that he went on vacation and then when he got back his kids got sick. ANYWAYS, after sending offers back and forth, I set up a deal for 100 packs for $200. I was stoked with just this because I could turn the packs around at $5 a piece on Ebay minimum and make a good profit. I plan on selling them at like $7 though. So, I was happy about that, and by the time he got back to me with the shipping cost, I had gotten another ebay user in on the deal. They are going to buy 200 packs for $700!!! So now I just need to finish up with the dealer. He said he would do 200 packs at $350, so I asked him his price for 300. He has yet to respond, but when he does, I’ll confirm it with him. Then, I’ll set up a listing for the other ebay user and get the $700 from them, then pay the dealer for the 300. Once he ships those out and I get them, I’ll send the 200 to the other ebay user and keep my 100. So, before I even sell any of my 100 packs, I’ll have made an estimated $200 profit (assuming I can get 300 packs for $500). Then I get to sell my 100 packs for minimum 5 a piece for $500. All of this in the end would equal a $700 profit for me. Great, isn’t it?
Though one of the charizard ex’s came from a con