Names like this are good to pick up when they drop, but I wouldn't hope for a homerun here.
TennisShoe is the less desirable singular form of the standard plural search phrase, TennisShoes. Strike one.
It's a .net. Strike 2.
It does get about 6600 e/gmsv so there is some value there- it's definitely worth more than reg, but when you say stuff like "having a company help me sell it", I think you might be overvaluing it a tad.