its easy to regret stuff like that when it takes so long to build back up. I hugely regret selling my carded and boxed stuff a few years ago as there are bits ive still not re-found. But then there are people who have sold and don't miss them.
Ha, I get those from time to time, im lucky in that I can shut the attic door and not worry about it and then go back to it when I see something to buy im enthused about or I motivate myself to get a few customs done.
i'm thinking you may be disappointed about how much you may actually get for them in today's market, they are not the grails they once were, unless you have the last 2 that everybody wants.