If you're looking for an exciting long satin prom dress that is as beautiful as it is budget-friendly, you've found it. This gorgeous one-shoulder long satin prom dress costs less than $150 but is an upscale style whether you are attending prom, a fancy gala, or a formal wedding. With two straps on one shoulder, this uniquely stylish long satin evening gown gets a sexy vibe with a diagonal keyhole cut out at the bustline. In misses and plus sizes, this long satin formal dress has a ruched sash that crosses diagonally from the waist to the hip, while the mermaid skirt flows to the floor with a flourish. For a sophisticated style that won't cost a fortune, this beautiful long satin prom dress hits the fashion bullseye.