I would check here........
https://daystateownersclub.com/
Site has a wealth of good information. Had some trouble sorting out a Mk 3 I purchased used at a bargain price and was able to find a fast solution.
If you don't find an answer to your problem, seek help as factory people monitor the site and often chime in.
Then, if it's a no go situation, Dave Slade is your man.
Good luck!
Pedro in PR
there are 5 models of the Harrier----the X model was the last, came in .177-.22, ten shot mag, the lightest at 7.5 lb and Mfg 2002-2003
all other models came in .177-.20-.22-.25
the X has a Blue Book value of 825.00 in 100% and all these facts can be found in a Airgun Blue Book, put one on your holiday gift list
Sure, I'll get right on it for $3,200!
I can't tell if your just funny or something else sunnysan, they are 39.95 and sometimes you can get the last edition for about 20 buck, just because there is some fool on Amazon selling one doesn't make that the price
https://www.bluebookofgunvalues.com/#/Product_Detail/691/12th_Edition_Blue_Book_of_Airguns