You don't have to spend a lot of money to buy a share in a successful company. Some stocks are priced below $50 per share and present a respectable upside for long-term investors. However, these stocks don't present an upside just because they have low prices. Rising revenue and earnings are two components of high-potential companies. These stocks check off both items, but they also have growth catalysts that suggest more gains are on the way. Some of these stocks also have low valuations that present a res ...