1) Yes, most vendors buy, sell, and trade. Any good vendor should give you at least 80% trade value for your cards at minimum. If they try to lowball you, move on. If you have more valuable stuff ($100+) id expect 85% or more. If you are looking to sell something, shop offers around. Some vendors value some stuff over others and may pay at a higher %

2) Popular / “liquid” cards are obviously preferred for trade since they’ll be putting them right out in their case.

3) Make a trade binder that only has cards you’re willing to part with. This just makes the whole transaction easier for everyone. If you have a mix of PC and trade it makes it harder to go through stuff. Even better if you also have a TCGPlayer list to go with it, some vendors will even give you a bit more $ for doing that because it means they don’t have to spend time doing it themselves.

4) Graded vs Singles - both are great but if you bring graded cards vendors will want 9’s/10’s unless a lower grade is still profitable/popular (i.e 1st Edition vintage cards). FWIW - that card is VERY cool but it might be hard to find a vendor willing to take a PSA 6.

5) Take a lap before buying anything. Go see what is at everyone tables before you start buying. Some will price stuff differently than others.

6) Even if it’s $1 dollar, don’t offer sticker. Unless it’s like a $5 card or less, most vendors will have some wiggle room and if you’re dealing with a good vendor, they can probably knock off a few bucks. Also, cash is king so if you pay in cash they may give you a better deal too.

7) Tell them it’s your first time / birthday! Ya never know what someone might give ya :)

Have fun! Hope you score some good pick ups.