(Image credit: Tom's Guide) If you aren't well-versed with the vast and expansive world of keyboards, you might think that a good keyboard costs hundreds and hundreds of dollars — but that couldn't be further from the truth. While some keyboards from the likes of Cherry and Corsair can cost nearly $200, you don't need to spend more than $120 to get a decent deck. Trust me, it's my job to test the best keyboards , and I personally believe most humans don't need to break the bank for them. Before diving into my top picks, I want you to ask yourself, "What do I need this keyboard for?" It could be for competitive gaming, hardcore productivity and typing, or a mix of both. You'd be surprised at how many sub-$120 keyboards exist, and just how outstanding they are (and they even put pricier ones to shame!). After having tested over 80 different keyboards — mechanical, Hall Effect, optical, you name it — I was spoilt for choice picking the following keebs.…