I have the Velo-Orange double-leg, folding Copenhagen kickstand. The folding styles are much better compared with rigid style (aka, motorcycle) kickstands in that they fold out of the way rather than at risk of being hit by your ankle or the cranks.
I bought a cheap pair of folding kickstands and disprefer them to the VOs. The problem with the cheap one was that the plastic "boots" on them fell off easily as they were not tightly fitted or easily secured with an allen screw. The spring is also not as strong and the manufacturing tolerances greater so it "clunked" a lot when I rode over bumps.
But it looks like you're in
Australia Russia so the VO may not be available to you. Still, I'd ask at your local bike store if they have a high quality version similar to the VO. The VO is US$33 so this gives you a sense of how much you should pay for good kickstand -- but be aware that some unscrupulous ebay vendors will charge ridiculous amounts of money for cheap merchandise in the hopes of catching a rube.