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I wouldn't necessarily replace them. Take a look at the condition of the contacts on the points and how much the rubbing block is worn down. Odds are you can clean them up with some very fine sand paper, re-set the gap and your good to go.

Leave the existing condenser in place and buy a spare that you keep in your car tool kit in case the one you have goes bad.
Practicing taking the one you have in and out a couple of times now will be a plus if and when yours go bad somewhere out on the road.