Go with brand new. Condensers are subjected to a lot of stresses given the pressure they are subjected to.

Surplus condensers aren't warranted against metal fatigue. And refrigeration systems typically work best without uncontaminated.

Similar logic follows with radiators, especially those with plastic tanks, the seals on those degrade over time.

Number of rows do not necessarily dictate performance. There are some poorly designed 2 row radiators that were built just to sell but make little or no difference in actual performance.

If and when possible go for brand new and from a shop/manufacturer that offers at least a 1 year warranty.