The San Francisco Giants, according to The Athletic’s own Ken Rosenthal, are likely to sell at the trade deadline. They are reportedly willing to listen to offers for any of their core players on long-term contracts, like Willy Adames, Matt Chapman and Rafael Devers.You were not surprised by this announcement. It was like someone holding a press conference to announce that they’re selling their very expensive iPod dock at a garage sale. They paid a lot for it — Sharper Image, even — but they simply don’t have the use for it anymore. They will not be charging full price, of course. But it’s not going to come cheap.It would be an informative announcement, but not an especially useful one, and the expensive, used iPod dock would still be there on Sunday afternoon.Those old iPod docks still have some value, though. Kids are modding their parents’ iPods these days and having a lot of fun with it. So even though you’re not going to get full price for your iPod HiFi Speaker (MSRP: $349) on eBay, they’re still fetching $100 to $200. There are still people who can use what that outdated tech has to offer, by gum.The Giants aren’t trying to sell a tube TV, in other words. There are teams that might want a discounted Adames, Devers or Chapman. There might be teams that want one of them so badly, that they’ll take on more of the contract than you would expect. Teams are, uh, you know, modding their Devereses and Adameses these days. You wouldn’t understand.In order to process any of this, though, we should probably figure out just how overpaid these three players are relative to the open market. As in, if Devers, Adames and Chapman were free agents right now, what would their contracts look like? They wouldn’t get the same contract that they’re currently signed to with the Giants, that’s for sure. But they would still get many millions, almost certainly for multiple years.Instead of just guessing at the numbers, I called in an expert. Tim Britton covers the Mets for us, but he’s also a utility player around here who gets called on often to pinch-nerd. His specialty is contracts — predicting them, analyzing them, et cetera — and he does a great job for us every year when it comes to our free-agent projections.So how far away are the Giants’ biggest contracts from the current market value? Britton has something much better than a guess for us. He begins ominously, writing, “I just want to start by saying I disliked all these deals the minute they were signed.”Now’s a good time to take a sip of water and make a comical glunk sound as you swallow.Willy AdamesIt’s tricky to get a truly accurate projection for Adames (and Devers) because if Adames stays on the same zero-WAR-or-worse pace that FanGraphs has him on, the projection systems will rightfully panic. If he has have some sort of second-half renaissance, the projection would be far more optimistic.So let’s split the difference and assume that Adames finishes this season with positive value, but not the typical 3- or 4-WAR-plus seasons we’re used to. With a two-win season, he’s hitting the market as a 31-year-old shortstop of moderate offensive value and solid defense. That’s a valuable player, but it’s not a nine-figure franchise cornerstone, which is what the Giants were hoping for when they gave him the contract.Willy Adames isn’t performing like the franchise shortstop the Giants thought they were signing, but he still has value for the right team. (Darren Yamashita / Imagn Images)The best comparison would have been Ha-seong Kim, but he suffered a serious injury right before his free agency. Britton settles on Jhonny Peralta, who had a long string of helpful seasons for the Guardians and Tigers before hitting the open market as a 31-year-old. It isn’t a perfect comp, as Peralta had 12.5 WAR over the previous five seasons, and Adames is closer to 18, but it’s a pretty good one.Peralta signed with the Cardinals for four years, $53 million in 2014, which would be the equivalent of $74 million today. Give Adames a little bump for being slightly better for slightly longer, and you have something like four years, $80 million instead of the five years, $130 million he actually has left.