Custom is a good idea! Always.
I see no real downside to 440C, it's considerably less expensive than many other grades of steel. And as mentioned, properly heat-treated 440C is nothing to sneeze at. I've bought a number of knives that I liked, and didn't care what steel it was made from. I always ask, but it's not that important to me. I have multiple knives for almost any purpose, many handmade, a couple of customs. Lots of different steels, 1095, 0170-6C, 5160, 440A, 440C ATS-34, ZDP-189, VG-10, etc. And they all make good knives. In most cases, steel is the last thing that would be a deal-breaker for me.
I see no real downside to 440C, it's considerably less expensive than many other grades of steel. And as mentioned, properly heat-treated 440C is nothing to sneeze at. I've bought a number of knives that I liked, and didn't care what steel it was made from. I always ask, but it's not that important to me. I have multiple knives for almost any purpose, many handmade, a couple of customs. Lots of different steels, 1095, 0170-6C, 5160, 440A, 440C ATS-34, ZDP-189, VG-10, etc. And they all make good knives. In most cases, steel is the last thing that would be a deal-breaker for me.

