I was fooling around on Amazon a few weeks ago when I found this knife by Oerla. I liked the way it looked and for the price I wondered if it was any good. The reviews were very good so for $25 I figured why not try it. I was surprised about how GREAT this knife is. Super smooth flipping action, sturdy, sturdy built, sharp blade, G10 handles that are not super aggressive but give good grip, and felt great in my hand. I have carried it quite a bit and really like it. Not sure what caused the discoloration on the blade, but it needs a good cleaning so that might fix it. If you are looking for a cheap yet capable knife this is it.
In the last picture you can see how thick the blade spine is. I do wish there was a smaller version, this one is pretty hefty, but I can't complain about such a great knife for the money.
https://www.amazon.com/Oerla-Foldin...8&qid=1527977076&sr=8-3&keywords=oerla+knives
https://www.amazon.com/Oerla-Foldin...8&qid=1527977076&sr=8-3&keywords=oerla+knives