If you can find a 30X for around that price then that is by far the best knife you could get at that price, even used. If you cant find a used one for that price then I would save an extra $25 dollars and buy a blem ZT 300 from Dave, KershawGuy here on BF.
The ZT 200 and ZT 350 (especially the StoneWashed version) are amazing knives for that price too. Ive had three ZT 350s, I ended up getting rid of me DLC coated ones when I found the ZT 350SW. Ive only had one ZT 200 and got rid of it, but only to fund my next purchase. I will buy another one, but Im going to try and hunt down the ZT 200KW instead of the DLC one. They are amazing knives, built to last. I like the 350 more than the 200 just because I like slim knives for comfortable EDC and I love the blade shape of the 350. But even though I like the 350 more, I still want another 200 because its a knife that makes you feel confident when its in your hand, it just feels like theres no way it could break on you. I like the size and shape too. There are only two reasons I got rid of it: 1. I dont like DLC, but I WILL have one in KW. 2. Im about to buy a knife Ive been drooling over for years but didnt want to hurt my wallet too much. So I sold it for about half of what Im going to pay for my new knife, Zero Tolerance 303.
I would also recommend a Benchmade Griptilian, I have a 550HG and LOVE IT! And because of its price you could either buy TWO, or you could buy one and slap on some custom scales and pimp it out, or you could make a 'Custom Griptilian' on Benchmade.com and choose what color of scales you want, have your name or something badass etched into the blade, and pick between different super steels.
Good Luck!