About spending and quality. My .02.
I adhere to the tenet that "you get what you pay for" and am a great believer in the value of pride of ownership of something, like a knife, that is both well made and useful.
But....with throwing knives....if you want to become competent, you will have to practice. For me, practice means owning more than one knife - so as not to have to walk up to and back from the target after each throw. I own eight throwing knives. Five of them I made myself because I realized that a) they are not that hard to make and balance; b) most important.....if you throw a lot, the knives are going to get cut up, banged up, dented and otherwise abused, especially as you get better.
You don't need to spend $45 on a knife to have this kind of thing happen. And it does.
I buy flat bars of mild steel 1/4" thick, cut them up into 15" length, shape them with an angle grinder and a SawzAll, drill the handle for leather scales, use nails for rivets, washers as retainers. Make them up for myself and my son. They throw as well as any I have bought....though they are not as pretty. After a season of throwing, the "better"knives aren't pretty either.
Pete