Are You Selling Yourself Short? Just Collect not only buys cards and collections from the public, but we also purchase a lot of our inventory from auction houses. Simple math suggests if we are purchasing sets and collections from auction houses, some of these consignors may missing an excellent opportunity to put more money in their pocket. Simple math? Yup, simple math. As an example, if Just Collect wins a set or collection at auction for $12,000, that means that the item