.NET is ruined among domain investors/speculators and therefore has little wholesale value in most cases, but it does still have marketability (retail value) for end users. As a website owner, you MUST incorporate prominence of ANY TLD if it's not .COM in many areas of the world. The logo must prominently display the TLD. like MySite.NET
As a site owner, I'd get a .NET over a .CO any day. .CO has the added downside of people who are used to .COM completing the .CO to .COM out of muscle memory when typing. Even if you display the .CO prominently in your marketing and logo, people will sit go to the .com out of pure muscle memory. I do it all the time.
As such, I will never invest in a .CO. Hated it from the day the TLD was introduced. And with the price increased to ridiculous amounts, it's as good as dead to me. But I digress.
At any rate, when I first saw your name, it spoke to me. It said "Name Us?, Who is 'Us' ". As such, I'd be surprised if you can even get $50 for it at retail.