These salaries are absurd for certain levels of experience and parts of the country. Also, education level makes a difference and if it doesn't, you would be a fool to accept these salaries with a Masters or clinical background and sales experience. If they want to start a bunch of college students green to the business, then sure 50-60k is reasonable. Base ought to be up at $75,000 for specialty pharma. Thats what I started at in the early 2000's, but I have several years of experience along with other pluses.
These are the reasons you will hear about differences and they are appropriate, so don't get yourselves all worked into a lather.
You get what you negotiate and you need to do so in according to what you have to offer. An experienced specialty pharma rep ought to be making 75k base, period over and done with or you have been had.