I was lucky enough a few years back to find a guy in my hometown selling two 6ft x 4ft whiteboards for €20 from a sports club. Before that I was playing around

I was lucky enough a few years back to find a guy in my hometown selling two 6ft x 4ft whiteboards for €20 from a sports club. Before that I was playing around with magic whiteboard sheets, which are a dragons den product that's basically a roll of a2 sheets that stick to a wall with static electricity and are dry erasable. They have issues though: Markers leave an indent of what you write and even though you're supposed to be able to move them around and restick them hundreds of times, in practice they started to peel off the wall after a few weeks, even if you never moved them.