If you want a single box receiver, one of the few decently priced receivers still made for quality audio and not for Home Theater is the NAD C740 which combines the C340 integrated amp with the C440 FM/AM Tuner. The C740 lists new for $499. For decent used receivers, look for NAD, Onkyo Integra (TX65 or TX870), or a Rotel (RX950 or RX975).
Whatever you get if you need a separate FM tuner; for less then $100 you can get a used NAD or an Onkyo Integra Tuner (T4015, T4017, T4057, T4087, T4150, T4500, T4700, T407, and the newest T4711 will be more). The Integra line is Onkyo's best and they are a good deal used and were built to last. The older NAD's sound nice, but are less reliable. The displays tend to go dead for some reason.