The one listed above to start. Go to click on the ad for the firebird and it is invalid. This was an issue with the last marketplace change.
Then the layout. There is nothing separating one ad from the next. It makes it difficult to distinguish which ad is which, particularly if there is no picture in an ad.
It's still disappointing all the make offer section and such from the 2nd last marketplace is gone.
RCU had the best and safest marketplace of any of the rc forums prior to the last change. The traffic in the marketplace has slowed down huge since the change but its picked up significantly on other sites simply because they are more user friendly.