General Forum

i have a set of about 50 Classic baseball cards that are firmly stuck together like a brick. 

What is the best way to unstick them without messing up the cards?

Most likely, the recycle bin will work best. You can do a forum thread search to find past discussion and I'm sure some will chime in. But likely many/most are headed to be made into a new form of cardboard. 

Yeah, this has been discussed ad nauseum in numerous forum threads.

A lot of different methods simply pulling apart/Steaming/microwaving/freezing/heat gun or hair dryer

I tried them all and the most successful was heating them in short bursts in the microwave. There was some paper loss and even burnt cards, but was able to save some as well, it seems like heating them evenly (like in an oven) would warrant best results as using microwave heats from inside out and a heat gun/hair dryer is the opposite and warped/damaged cards before you could even attempt pulling them apart. Adding moisture by steaming them just gave wet stuck together cards, just pulling them apart resulted in a lot of paper loss, freezing just made them cold. 

Im pretty sure results will vary depending on the card type and patience or lack of patience. Thinking about it the hair dryer/heat gun wouldve gotten better results if I was more patient???