Anyone selling Rador?

I am looking for some RayMarine Radar suggestions for boating. My Budget is around 300 US dollars, Please suggest me good Rador that have good navigation and detecting function. I urgently wanna buy it because I saw many dicounts deal at  , but I am so much confused to select. If here anyone is using RayMarine Radar plz let me know. It will help to select the best one.