I need to find somebody who can do all my PSD 'slicing'. So they will need good HTML and Css skills
I'm not based in Poland, but this doesn't sound very demanding. I mean, as far as I remember you don't even need good HTML and CSS skills for it, as Fireworks does this job for you. And even without Fireworks it isn't a big deal. I would definitely pay less than 1.000 Euro for such a simple job.