A 90 degree rotation is just barely on the "collectible" list, and since it has seen circulation, I don't think it is worth more than a few bucks. I could be wrong! Ask @paddyman98 . By the way, you won't find any graded rotated die errors listed by the grading services. They don't list errors in their census. Chris
Rotated Dies is the only Mint Error I don't currently own. They are interesting though when above the tolerance level such as yours. Price is tricky but I wouldn't say too much of a high premium for them. Here is one that sold for $175.00 attributed https://sullivannumismatics.com/coin/ngc-25c-2001-p-kentucky-quarter-90-degree-rotated-obverse-ms-64 @cpm9ball
I think your rite and wrong. While they don't publish they do have them on the list..Look at the ones selling highest at auction and the one you have is worth more than few bucks. But if you think that I will give you 20 for yours.
I don't have it in front of me but any modern especially statehood Quarters bring a premium for any error coin. When they started letting machines do all the work the people are picking out any error's only a handful a year get through.
