Difference here is that it's just barely after the 90 day manufacturer's warranty even if you've bought the NGX on release day.
Listings go as far back as ebay's listings show, however you can extend that look with the proper keywords with google, there's been defective or dead Nintendo/PS units since warranty periods ended on the first batches/sales.
Considering Sony and Nintendo have both sold hundreds of thousands times more units than Tommo, I don't see the relevance.
Which exactly explains why there's only a handful of listings for broken NGX units, while there's thousands each for Nintendo and Playstation. However it's technically more pathetic for Nintendo or Playstation to have defective units as they are multibillion dollar corporations, have full Quality Assurance departments whose sole purpose is to test and find all defects prior to release and after and also test and find any production defects and stop any from reaching store shelves, plus both companies are able to pour hundreds of thousands, if not millions in development and production, and not to mention.. both have released portables in the past (Nintendo, a bunch) and should of learned from experience how to avoid flaws and defects in both development and production..
Also to mention, both PSP and DS were "silently" recalled multiple times over the span of their life, morons each sent out whole batches of defective units (tens to hundreds of thousands of units defective right off the assembly line, sitting on store shelves awaiting for disappointed buyers to purchase a dead or defective system), just google nintendo portable recall or playstation portable recall.
Nintendo taking the cake with two massive recalls of the various nintendo DS models, first over 14% of all the various DS models sold have defective hinges, then on top of this an over 200,000 units (this is a conservative estimate) have defective, overheating, & exploding battery problems.
Tommo on the other hand.. this is their first time releasing a portable handheld. so one can expect flaws or defects as they do not have a dedicated QA dept, don't have hundreds of thousands to pour into development and production, and had no experience in a release of this nature prior to this.