Atlanta-based QUAD-i, owner and operator of Underneath.com, the Internet retailer of brand name intimate apparel for men and women, today announced that it is up for sale for $5.8m. Underneath.com has been operating successfully since December 1997. It is one of the few profitable e-tailers having posted a profit for its fiscal year ended June, 2000. QUAD-i, its parent company, never received venture capital and had to grow the business focusing on real revenue and profits with its initial seed funding of $40,000 from its founder's credit cards.