The seller was clearly trying to capitalize on the interest generated by the appearance of the "Roman sword" on The Curse of Oak Island, asking an even thousand dollars to purchase the sword outright.
I've entered more information on this sword into the database. I used the weight (2.6 lbs; 1179 g) and total length (17 inches; 43.2 cm) reported in the description. I estimatd the hilt length/blade length and proximal blade width from images taken with a ruler. Here are some basic photos: