I think it's almost impossible to use stand mounted speakers, (on stands) without marring the bottoms a little. I agree it should have been disclosed in the ad, but it wouldn't be a deal breaker for me unless they had very deep gouges and/or severe damage to them.
I've even seen speakers that were put on shelves where the paint from the shelf rubbed off on the bottoms.
I've even seen speakers that were put on shelves where the paint from the shelf rubbed off on the bottoms.

