Originally Posted by
cliffbar
Should I order the pedals online (where would be good for that?) and install them myself or take it into a bike shop?
Well, you can get some decent pedals (much better than the original ones that broke) from numerous sources. Here's two online sources for the same Sunlite BMX pedal in 1/2" thread (also sold as M-wave brand):
Niagra Cycle Works $12.99
Walmart $8.00
Both are the exact same pedal with alloy body, chromoly axle and adjustable ball-bearings. I don't see a need to spend more than that for replacement pedals as costs starts accumulating and can easily end up more than what it would take to buy a complete used bike.
Then follow this
Park Tool guide on replacing pedals.
