totally free to list and sell on ebay singapore. BUT, singapore site listings dont show up on other ebay sites. So, many singapore sellers list on other sites (such as .com) in order to get the worldwide exposure, hence the announce on ebay.sg about fee hikes on various intl. sites.
Some sites fees went up, some stayed the same.
eBay sg, china, philippines, and malaysia are all free sites. Items listed on singapore, philippines, and malaysia dont show up on other sites.
Items listed on China site will show up on other sites, but many know if it's a china listing it's a fake or fraud so wont buy from there. And, you have to be able to read chinese to sell on site (plus be able to accept payments in yuan/RenMinBi -- chinese currency -- and be willing to ship to China)
As for other sites - some have same sort of fees as new fees for .com, others have cheaper fees. ebay belgium used to have lower fees than .com, but dunno what current fee structure is (and again, there's the language barrier thing)