>>9402164Mandarake may offer singles without the need for a proxy. Amazon JP, YJ, Rakuten would also offer singles but you usually need a proxy for those, yes. Sales of singles usually require you to wait until after release.
Also, Bandai Candy Toys are sold in boxes of 10 or 12 but it's not random, they try to stuff the maximum number of full sets into the box, like pic is a box of 10 with an assortment of 5 types so they simply pack two of each.
With Mobility Joint series 1, it's a box of 10 with assortment of 8 so you'll get 2 extras that are also same in every box. Typically it would be the Gundam
