The heaters sold as new in the Fluxer web store are new heaters that were built for customers but never paid for. This doesn't happen very often, but it does happen from time to time. Those heaters get listed here.
My blemished heaters are brand new heaters trapped in cases with slight irregularities, mostly small issues with anodization or machining. Some of the belmishes are very small, others are just straight-up blemishes. Prices are slightly discounted because of these defects - the more the discount, the greater the defect.