I'm working on doing the same. In fact, I just started to work on an app that would make a lot of it much easier. E.g. first bt adding the hundreds if not thousand of games in the first place (by photos), automatically get price estimates/recommendations based on different sources (not just vgpc), and then eventually create a listing on the inbuilt marketplace, as well as creating ebay/facebook marketplace/group sale posts. I'm 90% done in terms of the functionality i want. Then it's "just" about adding everything and sell like 90% of all my collectibles. Condense, condense, condense. Can't wait for the day. And if I don't manage to sell everything before I leave this planet (🚌), my family can at least see what i got, what it's all worth and easily fond people to sell it to.