I've bought large lots five times. Only one time was I completely happy. The worst time was back in 2003 or 2004 and he neglected to mention that he smoked. I wasn't even able to actually even look at those cards- cigarette smell causes me to have difficulty breathing. I still have the boxes. I threw some dryer sheets in the boxes because I heard that would help, and then never touched them again...I used them as the basis for a wall to stack my model kits on. Have not opened since new. Hopefully they didn't water damage in any of the leaks I've had over the years but they were damaged badly anyway. That was $100 thrown away. Zero new cards added to my collection.
The first time was a nearly full 5000 count box of NASCAR cards from a dealer at a show. All the Dale Eanrhardt and Jeff Gordon cards were pulled out, and there was a lot of duplication. 8 to 10 copies of most cards. Most of the cards have surface scratches. This would have been around 2000. Don't know how many new cards I added to my collection, I didn't have those stats yet.
In 2010 and 2011 my local NASCAR store closed and I ended up with every trading card in the store, some of which I paid for, some he just gave me. Most of them were in extremely poor condition. They were stored loose in a bucket and badly handled. I knew this going in though. It took three trips to get them all but I ended up adding about 3000 cards to my collection.
I didn't do it again until 2018 when I bought a collection from Database member Sousafly. That is the only time I've been truly happy, the cards were in good condition, and there were a LOT of them- probably about 25,000 cards all told. I have not even opened all the boxes yet. A lot of them were duplicates to what I already had, but I will likely end up with about 5000 new cards.
In February 2020 I went to a card show I bought a literal shoebox of cards. It had every sport in it, but I don't think anybody looked at it since 1997, the date of the newest card. The cards with UV coating had bricked, many had damaged corners, But it was only $20 and I got exactly 998 new cards from it so I'm not totally unhappy. I just finished scanning the 1993-94 Score American cards I got from it yesterday. They had no UV coating so only 2 out of like 200 were damaged bad enough I didn't scan them.
Just last week I bought a 5000 count box of NASCAR cards from a guy in Quebec. He got them here super fast, but the condition isn't great. A lot of bad corners and surface scratches. Considering it cost me $195 with shipping, I'm very disappointed, even though I've gotten about 500 new cards and expect to have about 1000 new by time I finish, and have already completed 3 inserts and 1 Parallel set I've been chasing for 20 years, due to cost and condition this will always be a dissapointment. This was the most expensive of any of the lots above, which is why it's the most frustrating. If I had paid $20 or even $50 I wouldn't have been unhappy.
I don't want to scare you off though. I've had great fun with repacks over the years- it's actually my second favorite way to add cards to my collection, roughly half of my NBA collection came to me from repacks. If you aren't a stickler for condition, it would be even more fun. Lots like this are pretty much a form of repacks.
VERY slow trading due to health problems. Not transferrable so safe to trade with, just moving is painful and can't always access the cards.
Cardboard History My COMC
New Collection Website: Cardboard History Gallery (Still under construction)
Tips on how to make your scans look like the card does in hand (No more washed out, fuzzy scans!):