Product review (4 stars): Amazon's got great appliance spare part pricing too!
Found the official repair manual for my GE Harmony gas dryer online and used their troubleshooting guide to find that my dryer's problem was a bad speed signal output from the blower motor.  Replacement was easy and fast and I saved a few hundred dollars by doing it myself!  Kudos to Amazon's vendor for listing this part at such an attractive price compared to retail too!

I'll give it 4-stars based on my overall successful ordering and repair experience.