I'm acquaintances with two employment lawyers and they talk shop when they're together. Their hourly rates are 300-500ish so 5,000-10,000 is 20ish hours of work. For that amount of work they are looking for an employer who is risk averse , and an employee who emotionally has moved on and is just looking for a little extra cash.

If the employer is legally aggressive or the employee is looking for a fight they would never take a case like that.