Looks like I just scammed myself for around 99div

Do as I say, not as I do; price check your items properly guys, especially ones potentially worth 10 times your current net worth.
According to some helpful dm's this was worth quite a bit more than the 100ex I advertised (and sold it) as

rip to the morior invictus I was going to buy with this
Welp, what can I say except don't roast me too hard pls.

edit for clarity:
obviously I was, and still am unsure on how expensive this really was. 2 people dm'ed me right after posting, telling me that I severly underpriced and its 'more like 100 div, not 100 ex' maybe I took it too literally, but still this was a bad price and should serve as a reminder to check your items properly

https://preview.redd.it/sb0g6cpsifee1.png?width=435&format=png&auto=webp&s=2f3b70d5601fea8ea9b782232ac35df16df57245