What you have is mainly a 5 of a kind (7s). If they are all in a row with no other numbers in between its called 5 in a row. 5 in a row/5 of a kind are overall common finds if you search often, and while they also may sell for a small premium (such as in this case since they are lucky 7s) its really not considered very collectible outside of a more casual collector and also may draw some interest from the casino community. It should be noted that its only when you get to a 7 of a kind/7 in a row or a full 8 of a kind to be where the serious collectors start jumping in with interest and condition in those cases also matters. I got the same response from those two for a 6 of a kind by the way.
More experienced collectors oftentimes say that these kinds of bills are not fancy or that they're "spenders," meaning that their only value is their face value and this also includes trinary serials.
As with most hobbies, there are people just starting out, people who have been at the hobby for decades, and everything in between. And, correspondingly, there are different kinds of bills that match the different levels of experience. 5 of a kind other than with the lucky numbers for example are the "beginning-level collector" serial numbers. it's a way to encourage the hobby with people who have never done it before. Everyone has to start somewhere, might make a few bucks if you try to sell one. If someone gets a few dollars by selling something they just happened to find in their wallet, they're going to feel great about it even if they spent an hour listing the bill, managing the auction, and mailing it out to the buyer. This kind of success might get them interested in learning more and starting collecting. Heres some others to look for to start: https://www.coolserialnumbers.com/F...Numbers.aspx
You could try finding 5 of a kinds in each year, or each bank for each year as a challenge. A lot of people have fun just finding them or collecting, its not always about profit.