Look closely at the bearings they offer you. There are junky counterfeits available in 3rd world countries, and sometimes in major countries. The box should be decent printing on good cardboard, and the bearing should look well made, not like it was out of a (good) home shop. There must be good Russian brands, plus any Japanese or European brands. SKF brand is world-wide and top quality, and good bearings are made in many countries under many brand names -- I've used dozens of SNC Italian ball bearings with great results, as well as many other brands.
The double sealed -2RS bearings mentioned above are pre-lubricated with long-life grease. Put them in and you're good. (2RS means two resilient seals.)