The better solution would obviously be to resell the game. But if the game isn't very good, isn't very rare, and isn't in pristine condition, that is not so easy either. If you sell it online, on a platform like eBay, you risk meeting obnoxious people with extremely high demands only wanting to pay bottom dollar. There used to be a shop in the area buying used games for a pittance, but even they stopped doing so. While international websites like BGG have a marketplace section, international shipping for a big box game is very expensive.

So I looked around for a national board game forum, checked whether they had a marketplace, and then asked on the forum whether their rules allowed me to a) give a game away (to avoid the discussion how little a used game is still worth) and b) limit that offer to people who would come and get the game by car (avoiding shipping cost and effort). That worked out pretty well. The game I mostly wanted to give away was Malhya: Lands of Legends. I had backed that on Kickstarter, it arrived over 3 years later, and by then it wasn't really a game I wanted anymore. Malhya is a game that would require a lot of effort to learn and play. If I am going to play a game of that complexity, it would have to be a top rated game like Elder Scrolls: Betrayal of the Second Era. It was obvious that Malhya isn't quite that good, and I didn't see me put that much effort into a just okay game.

On the forum I found somebody living an hour or so drive away from me who was only too happy to get Malhya for free. We chatted online, arranged to for a date where he would come and get it, and I asked him whether he would like some other games as well. He did, so I also got rid of 4 big boxes of Tainted Grail in different conditions from played to new; I had tried the main campaign three times and never finished playing it, so I had given up on that game. And I also gave away another big box campaign game, Artisans of Splendent Vale, where I hadn't realized on backing the game that it was in fact an attempt to bring the culture wars into board gaming and make a "politically correct" adventure game, with limited success. I threw in some smaller games which I had played and not liked all that much, like the recent Covenant.

This ended up feeling like a win-win deal: I gained two empty shelf sections, and the guy got a car boot full of games to play. As he clearly appreciated those games more than I did, that felt a lot better than throwing the games away. I do think that I will do further collection cleanup actions in the future. In the end, a board game I don't want to play is better off elsewhere than collecting dust on my shelf.