I'd list your Hustle card around that number as soon as the market opens. Look at what they are listed for and undercut by a little. You will likely be able to buy the same card a couple hours later for half price. If they announce a challenge it will shoot back up to $50-60ish, so if you want to hold in anticipation of that then it may be smart.
As soon as market opens all the flippers start selling and the price slowly trend down until it bottoms and stabilizes. Selling really early gets a better price generally. If a challenge is announce you may not get back in. If you get a good serial number it could go for more. It gets kinda random so I could be way off... I've been surprised before.
I love the Rudy moment so I will buy it to hold it.