The serial number is from 1989 but Radius was introduced for the 1990 model year, so your Eros should be a 1990 model. The Eros was 2nd from the bottom of the lightweight road bike lineup in 1990 and had an MSL Of $565 US. It's probably fairly rare as road bicycle sales had really plummeted in favour of ATBs and most cyclists favoured Shimano equipped models over SunTour. However rare mechanical and cosmetic condition, how you plan to sell it and the local market conditions. The Ebay auction was from Italy and I would dare try to correlate that market with thee US. However, I'd guarantee that you'd make a big profit.