400 huh? well....... how are the tires? and how long did the person have the rims/or how many if he'* not the original owner? for that price I'd make them my winter wheels (if the tires were meaty)
don't worry about the ride you'll be alright, you might like the way it rides better with them on.
use chrome polish about once a week to keep them looking newer, chrome looks awful when oxidized, rain and other natural elements have you upset when it comes to chrome not being kept up properly (stock'* are starting to suffer from past owners bad behavior)
400 you can't loose unless you need new tires which run around 500+tax