No absolutely not!!!
I have been in this game for many years now and during this time, I have been employed, unemployed, inexperienced, experienced, basically I've seen the lot. Bearing all this in mind, I have never seen the need to what can only be described as prostitute myself in order to buy a job.
I can also say hand on heart that in my early days I was offered a job on the condition that I first paid for the type rating and subsequently refused it on those grounds.
My firm opinion is that people who do sell themselves in this fashion hurt themselves, their colleagues, the industry and generally hold back pay and conditions for everyone.