I see a few low paying jobs for experienced people, but I also see a lot of 80-130k jobs. Most of them require at least a Top Secret, but not all of them. Try clearancejobs.com if you have any kind of clearance at all.
A resume farm is an entity that collects (farm) resumes. The job postings are most likely taken from other sites. Salaries are inflated to make you want to submit your resume.
Are there any reputable job sites? I have mostly been looking for positions posted on sites such as clearancejobs.com, but I usually apply directly through each company's website.