I always check for the country of manufacture and wary of anything from China or India.
I did buy from a UK seller on eBay. Quite a few UK sellers on eBay are selling goods made in China or India and when you purchase you do not know the country of manufacture.
When i contacted the seller, he was very apologetic and sent me on a replacement of far better quality.
Lack of knowledge of the goods being sold is often a problem on eBay i think. China and India both produce good and bad quality goods to cater to market demand.
If you want something cheap to keep your costs down as a reseller you can easily find them in both countries. If you want quality you will also find it in both countries, just don't expect to pay buttons for them.