There's a lot of cheap his and hers wedding rings with nice designs at Etsy. Over 25,000 different ones priced below $50, including 1,200 gold rings, 500 rose gold rings and 300 white gold rings.
You can buy cheap wedding rings here. The cheapest ones start at less than $10. The cheapest personalized one costs $35. The cheapest yellow or rose gold plated rings for her are just over $20 and the cheapest yellow gold plated rings for him are just $10.
Look for the category Jewelry & Engagement under Jewelry. You can find almost 300 engagement rings, about 300 women's wedding rings, and over 500 men's wedding rings priced at less than $50 here. The cheapest rings are under $10.