Real Estate / Buying a flat in Krakow; prices are still falling? [200]

1) the minimum amount of deposit of the value of the property- the banks would ask for the mortgage.
For polish citizens in the law there is no demand of deposit. It will change from next year when it will be 5%. However some banks want it, but no more then 20% of total value of transaction.

2) agent fee
Depends on the agent - usually from 1-4% of property value, this cost is highly negotiable, so worth to check in multiple agencies. Everybody has to posses license, so they are proffesionals.

3) legal fees & paper works
If you are not EU citizen you might have to get a permission for buying a property. The transaction will be handled by agent and notaries. With the credit they will want you full time working contract.

4) any other cost I might incur during the purchase of the property.
permission for purchasing a real estate, market shares, stocks by foreigner – 1.570 zł
promise – 98 zł
another decision, regulated by law- 10zł
letter of attorney – 17zł
issuing certification – 17zł
notaries - some percent from the property value

Maybe you can find some more help and infos here - en.polishproperty.eu/why-poland/legal-site