Yes it's quirky, but apparently it's not unusual for upside down bubbles to be Kosher
For me in the collecting arena, you end up with all sorts of quirky pieces, if this was on FB I'd be saying " wow, it's unique piece" But in the real world just thinking it might first in someone's collection as it doesn't fit in mine
If I understand correctly, the bubble has been re sealed to the card? If so then it’s normal to price a re seal as a cardback and figure, so was thinking less than £100, possibly around £60 - £75 as the condition is great. Please correct me if I’m wrong! If not a re seal then more like £200- £225.