Hi guys, I am going to buy the first ever mkb in my life

Need some advices here.

I am buying a mechanical keyboard for normal gaming purpose. Currently I managed to find some 2nd hand keyboards in forum with few months of warranty left but I also found some completely new keyboard at cheaper price from taobao but without warranty.

I am planning to do some modding on my keyboard after I have enough budget for it too.

Which should I choose?