Hello mate,
I paid £150 for an ungraded example a few months ago (may have actually been £170). Its more yellow than yours and not in as good shape. Not a beater by any means, just not as nice. I don't think you are way off with your price.
These don't seem to be popular. Don't know why, I really like it, particularly on this card. It just doesn't seem to work on the trilogo because of the massive bubble.
From your pictures, the bubble looks really good for a POTF. I know it got the yellow designation on the grading but it doesn't look too bad to me at all.