Reply to heeeeelp i'm new!!!!

Hello, I want to buy cd players, new or used, but no more expensive than 400 euros (518 dollars)(I already have a mixer). More or less this amount of money I have found the used pioneer cdj 100 and 200 and the new Gemini cdj 250, Stanton S250 and S300, NUMARK Ndx 200 and 400 and NUMARK icdmix3. From what I understand the pioneer in general is the best? Got any advice?
thanks