Posted By:
Dan Mathewson...so here are two more cents.
Card trimming seriously (if not completely) devalues a card. It is altered, no longer in its original condition. To leave that very critical information off is not acceptable, especially since trimming is not easily noticeable in a scan on eBay.
The only thing that would make it worse would be to not only leave the info off, but to try and actually hide it by putting it into a PRO holder (or something of that nature) to try and make it look authentic and unaltered.
Either situation is not cool. Most collectors would, at most, pay a tiny fraction of market value for a card that has been trimmed.