new air conditioner or repair 10 year old unit

i'm pretty darn handy but i also don't want to waste my time polishing a turd to save 200$ for 10 hours worth of work. (although i love learning something new ) i guess the big mystery here is what exactly is wrong, i've messed around with house ac's, and these ac's on my rig and from the way it is acting, i think the pump/motor went. i will switch out capacitors cause i think i have a spare and see what happens