BV has always been a joke and there have always been cards that sell at xx% of BV (as well as some that sell at xxx% - but rarely). It's good for trades and for naming insurance replacement values.
I've made 3 fair-sized purchases from COMC and am indifferent as to whether the BV shows or not. I imagine this might make it harder for sellers, though, if they want to set sale prices as a % of BV. I should probably read the blog link that Timber09 posted...
