Disc brakes and under $300 isnt going to happen new! that said, YOU didnt say where you were so all I can do is offer this as a first best bet for your price: http://www.performancebike.com/bikes/CatalogSearchResultView?catalogId=10551&storeId=10052&langId=-1&sortBy=Dollar+Rank%2f%2f1&searchType=categoryId&searchTerm=400308&beginIndex=0&pageSize=16&ipState=c0%3di%253A1%253B1%253Biphrase%2bbundle%2btaxonomy%2bid%2bfrom%2broot%253B400308%253B%253A400308%253B1%252C1%253B0%26q%3d16%26a1%3diphrase%2bbundle%2btaxonomy%252F%252Fv%253A0%26a0%3diphrase%2brelevance%252F%252Fv%253A0%26i%3dsitemap%2bid%26k0.0%3d400308%26qt%3d1252025393%26qid%3dqS7MFGAKeTd47%26vid%3dvEU87YRPXMhV9%26ioe%3dUTF-8%26s2%3dsitemap%2bid%252F%252F1%26qtid%3dnS7MFGAKeTd47%26s1%3diphrase%2brelevance%252F%252F0%26rid%3drQctS8r4VSNlj%26s0%3dDollar%2bRank%252F%252F1%26t%3d0%26m0%3diphrase%2bbundle%2bid%26mcmode%3dtest&cn1=f03%2f%2f200+-+400%2f%2fp%2f%2f0%2f%2f15%7c%7c&categoryId=400308 There are NO bells and whistles at the $300 mark but then again you didnt specify what those are either. Bells and whistles dont start until you get up over a grand and higher. Anything that will be any good in your price range will be second hand if you are lucky.