The iBuying leader produced better-than-expected results, but is it a viable model long-term?Opendoor (OPEN -1.03%) reported first-quarter results that exceeded the high end of the company's own profitability guidance. With management expecting margins to improve in the second quarter, and for sales volume to increase significantly, should you consider buying the stock? In this video, we'll take a look at the latest numbers and the reasons to be optimistic as well as cautious.*Stock prices used were the mor ...