The Short Answer
Your Griswold cast iron is probably worth between $20 and $200, unless it's something really special. The company made cookware from 1865 until 1957, so there's a lot of it out there. Condition matters way more than age, and the market has cooled down significantly from the peak cast iron frenzy of 2015.
What Actually Sells and for How Much
A standard 10-inch Griswold skillet in decent condition? You're looking at $30-$60 on eBay. A 12-inch skillet moves for roughly $40-$75. Nothing glamorous, but honest money if you're patient.
Now, the exceptions. A rare Griswold waffle iron with the original stand can hit $150-$300. A vintage Griswold Dutch oven in excellent condition (and they rarely are) might fetch $100-$150. The ultra-rare stuff—like early production pieces or unusual sizes—can legitimately reach $300-$500, but you're talking about maybe 5% of what people actually own.
The Condition Problem
Here's what separates the $20 pan from the $120 pan: seasoning. A well-seasoned, rust-free skillet with readable markings commands real money. A pan with rust pitting, stuck-on crud, or illegible stamps? That's a $15-$25 item, and you might struggle to move it.
Restored pans are a weird market. Some collectors love them; others won't touch them. A professionally stripped and reseasoned Griswold might net you $50-$80, but that restoration often costs $30-$50, so you're not gaining much.
Don't Forget Shipping Costs
This is where people get surprised. A 12-inch cast iron skillet weighs 5+ pounds. Priority Mail shipping from the US runs $15-$25 depending on destination. If you're selling a $40 pan and shipping costs $20, you've just halved your profit. Factor this in before you list. Some sellers fold shipping into the price; others charge it separately. Either way, it eats into what you actually pocket.
Where to Actually Sell
eBay is still the main marketplace because collectors are there. Facebook Marketplace and Craigslist work if you want local pickup (no shipping headaches). Specialized cast iron groups on Facebook can be good too, but they're picky about condition and pricing.
The Real Talk
If your parents left you a box of Griswold pans, congratulations on inheriting functional cookware. If you're hoping to fund a vacation, you're probably not getting rich here. A collection of five average skillets might net you $150-$250 total, minus shipping and fees.
What you should actually do: If the pans are in decent shape and you don't cook with cast iron, sell the best two or three pieces individually on eBay (you'll get more per pan). Bundle the rest into a local Facebook Marketplace lot for $30-$50 and let someone pick them up. You'll move them faster, avoid shipping hassles, and still make reasonable money for items that would otherwise just take up space.