I only see one on that list which claims to be a Confederate sword and the opinion is contradictory:
Quote ".....The only 98th regiment we could find pertaining to the Confederate states was the 98th Regiment Militia (Mecklenburg Co) of Virginia. We believe the 1897 marking is the date, not a rack number, as it seems unlikely the 98th Regiment would have a need for so many weapons at that time. Therefore, given the dated regimental markings are "98 REG N3 1857", pre-civil war, they make sense. Being fair and accurate, the sword is therefore a pre-civil war sword that we believe would have been part of the Confederate states armory during the civil war itself......" Quote
They believe the 1897 is a date? The Confederacy ceased to exist 32 years prior to that. While the sword itself may well be authentic, I doubt it's connection with the Confederacy. In fact the photos show no markings that connect it with the CSA or the USA. They state that they believe it to be Confederate because the only 98th regiment they could find with a connection to the Civil War was a Confederate regiment. Fair enough except; it doesn't explain where they deduced a connection to the Civil War at all?
Of course if they'd like to send it over for authentication it would fetch far more than 1500 pounds (although likely not as much as a cavalry saber would fetch)