If you can find one in NM condition, expect to pay around the market price, as there are sales as high as $56, with LP cards only dropping to $50
Thankfully, over the past decade, even Wizards has realized that partners are pretty broken, and now they avoid printing more cards with the mechanic, instead relying on various partner-with-style mechanics that do something similar but with a much smaller pool of cards to choose from, like how you can partner a Doctor's companion with a Doctor from the Doctor Who set
Giving all of our Zombies +1/+1 whenever we draw a card can overwhelm our opponents with just a few Zombies on the board
Two additional insert sets are also on the checklist
In an Era marked by rampant overproduction, 1991 Wild Card was "limited" to 30,000 numbered cases, each holding 10 boxes of 36 packs, or around 810,000 of each base card
Spreading damage onto your opponent's characters and shifting in a Robin Hood, Sneaky Sleuth on the right turn can help you get a big boost in lore, and spreading out the damage will also help ensure Robin Hood, Timely Contestant doesn't get stuck in your hand