Wingbar - BALPA is a union, not an employment agency! That's not meant to be a facetious comment by the way.
A union exists to protect its members' employment rights. It may offer other services that it thinks might help in other ways (e.g. financial advice, insurance etc) but no union will usually find you a job unless it's part of a redundancy issue.
I'm an 'unemployed pilot' member and I pay my £2 per month. I don't think I get particularly good representation as a low-timer from them but for £2 a month, it's worth being a member 'just in case'.