German Luger handgun

Hello! I`m considering purchasing a collector grade luger as opposed to a shooter where the part numbers don`t match, but I don`t know very much about them yet. A vendor at a St. Charles , Mo. gunshow told me a lot about part numbers matching, russian imported lugers with the barrell stamped for import to the US,etc. He had one with black plastic grips he said were original, but the one my relative brought back from ww2 has wooden grips. I would like to hear from someone who has a good one for sale.