Bmw E21 Parts Needed

[BMW fan]

Hi I have just purchased a clean bmw e21 wanting service parts any help? also I have a small problem with it and that is, when I start breaking the first break doesn't seem to work and second break works well. I thought it could do with bleeding so got that done at a local garage but still it's same problem, the break fluid is also topped up, I was reading on internet it could do with needing a master cylinder ?

[Guest Mister Dabsy]

Yeah, sounds like master cylinder seals are worn allowing fluid to draw back

[BMW fan]

Thanks mate, any idea which is best place to buy one ebay?