I hate to report this as I found this incredibly useful but you can bless Cursed Gourmet Meat to remove it without price at the Trademond white priestess I think this is a glitch because you both use Bless I but she can bless it and you can't.

Thanks for the report! Fixed.

What was the glitch was it the priestess purifying it or the player unable to purify it

The priestess being able to.