Nrs had a bunch of E series used marked down. If you read the disclaimer it says
Specifics about this item: This boat was used by an outfitter in the Colorado area for 5 seasons. It has been refurbished by the NRS boat factory. The boat's tube material was showing premature wearing, so patches were installed over large areas of delamination. Lots of custom accessory patches and foot cups, plus 2 thwarts are included. Sold as is, no warranty.
The premature large areas of delamination is an area of concern. Is this a bad batch of fabric?