I noticed a Roku, a remote-controlled car, rows of monster-size televisions, a projector, the complete DVD set of “The Sopranos,” a collection of Ronald Reagan westerns, laptops, digital cameras, chainsaws …

That’s what you first notice — and then keep noticing — as you walk through Optoro’s Lanham space: lots and lots of stuff. Returned or excess stuff, to be precise, as Optoro — one of Greater Washington’s more closely watched tech startups — is in the business of optimizing the sale of unsold items for some of the nation’s largest retailers.