Is there a standard list of highly valuable MTG cards? I have a couple thousand cards from the mid-90s and while I’m sure they are probably worthless, I can’t bring myself to just dump them even though I haven’t played in 20 years.
If you wanted a starting point, Scryfall is a useful tool for looking up cards (though they're missing pricing data for some early cards, presumably due to scarcity of transaction data). Here's something to get you started (cards printed before 2000, sorted by price, displayed as a price list): https://scryfall.com/search?q=unique%3Aprints+sort%3Ausd+dat...
A lot of it will come down to the value of your time. You can sell directly yourself but deal with headaches and scammers, or you can sell to someone like Rudy for what will likely be ~50% of prices you'll see online. Part of that is that most of your cards will probably be considered in "played" condition, either light or heavy.
IMO you'd get a lot of mileage from the "Reserved List" or "Vintage Staples" but site is decent for a general price lookup as well.
Feel free to shoot follow-up questions. There are a few cards that went from trash to treasure since you've been out of the game. Lion's Eye Diamond probably the most extreme example, but basically anything on the Reserved List has gone insane in the past few years.
I've got an old collection from the early 90s as mentioned in my comment further up.
Are my black bordered cards indeed Beta?
I'm going through this list you shared for the Beta edition cards and some of these prices are ridiculous.
I'm pretty sure I'm misinterpreting something.
I played these cards to death and didn't really care for their condition aside from just sticking them in plastic sleeves.
Anyway this was a fun little trip down memory lane.
Maybe they'll be worth something in another 20 years?
https://old.reddit.com/r/magicTCG/comments/bsvg6h/an_updated... is the best way for you to answer "what set is this Magic card from?"
Modern dual lands come with restrictions/penalties for taking advantage of their dualness (time delays, damage, choosing which version to use when played, etc) and they are often some of the most valuable cards in a set.
https://mtg.fandom.com/wiki/Dual_land
And they are literally what their type lines say. So you basically get two lands with a basic type for the price of one (i.e. one card, or one land drop; card and tempo advantage, 2-in-1). Their only limitation is that they are not basic lands so they are subject to the restriction of number of copies per deck (4, in most formats).
Every dual land created subsequently has some kind of drawback or limitation (other than the number of copies restriction): "Enters the battlefield tapped", paying some amount of life or taking damage, sacrificing a permanent, discarding a card (I think), printed as bouble-faced card, and so on.
I still have my collection from the 90s, which I obsessed over as a kid.
I just used the fellow HN user's link in this thread to check the value of some of my cards.
Turns out my black and white vampire angel deck is worth a chunk of change!
And at the time I remember being teased for using outdated Beta cards because I was too poor to buy newer packs.
Thanks for the trip down memory lane ^_^