There are so many bargains to be had in online shops. Have a look at the many gold dipped, gold plated or vermeil jewelry. That pendant or ring you found for $20 -40, even that $100 14K gold ring, why not get it? it's a bargain. Aside from the possibility it'll fall apart soon and tarnish.
It is very likely that the price for that "gold" piece cost families here and abroad. For a taste of what your average bargain jewelry does to families check out this Nat Geo video (and if you search you'll find many more.)
https://www.youtube.com/watch?v=lgAKeTGHx5g&t=214s
https://www.youtube.com/watch?v=J3d30l2biVo
This is why the Green Jeweler uses reclaimed solid Gold and Silver from US metal companies.