What are the best sources for sales comparables? ebay?
Mercari as well.
There are other sites that compiles sales across various platforms, however I think you have to pay monthly fees and they’re just pulling info off readily available platforms like eBay and mercari, maybe comic link.
And their data might have errors. Not sure how much they filter out junk. So you end up verifying through those sources anyway, I’ve found.
I just look at completed listings on eBay under their advanced search feature.