Hero accounts go for more than 1 Bitcoin, im not sure about the rest. It depends on the market, go on the marketplace section.
Not any more they don't. From what I gather they go for around half of that. Some sell for 0.4 though around 0.5 seems to be common. Seniors go for about 0.2 and Full go for around 0.1, but of course there are different factors involved such as post quality feedback and proof of ownership etc.