Prelude eh? Guessing mid to late 90's given the ball joints have gone on ya...
Guessing its the 2.3L w/o vtec.
Looking up a 1996 Honda Prelude, 2.3L i4
Now heres the thing... They sell the ball joint separately, and its around 15$ for the lower one. They also have a tool that you've got to have to press it out (not really have to have.. but the shop will say you've gotta use it), its 100$, but they've got it at auotzone as a loaner tool. You just gotta put a deposit on it to take it home with ya. You get it back so long as you don't break it.
OR:
They sell the entire upper control arm with the joints already in. Simple unbolt/remount job there, before the alignment ofc. Thats gonna run 120$ per side on the upper, 110$ per side on the lower.
So thats 460$ and you'd have all brand new equipment under there. Verses just having new joints on existing parts.
You can probably find a shop that'll do it a whole hell of a lot cheaper than 100$.
Guys around here advertise 40$ front end alignments.
Note: This is going by the autozone website for prices. If you know someone with a dealer account, they can get them cheaper. The shop will also be able to get them much cheaper. Keep that in mind.