Does anyone know the cheapest way to move stuffs from London to Poland? I have tried to contact a few removal companies but none of them quoted below £500..
You could try searching on the internet for any transport willing to move you. You are very lucky that you can get a quote for less than £500. No one will do it for less.
There's a Polish courier company called Eurospedycja, based in Ireland, who can ship from the UK to Poland. If you just want to send stuff like books, cds, clothes, general bits and pieces they work out very reasonable. I've used them and found them very reliable. They also do regular removals starting at 246 euros.