A company called Camber makes inexpensive drum cymbals. The alloys used are more on the brass side, which makes for cymbals that don't resonate well or which have poor overtones. Camber cymbals are typically sold with the very low-end drum kits. The three big cymbal companies, Zildjian, Sabian and Paiste, have produced low-end cymbals that use better alloys, which sound marginally better. If you're a proficient drummer, you'd stick to the big three makers and use their best cymbals, as the cheapies tend to sound like pot lids and trash cans.