Key Points Opendoor's cost of sales account for around 92% of its top line. Other companies gave up on the iBuying business because it was too difficult to predict prices and turn a profit. Revenue growth alone may not be a recipe for Opendoor's stock to succeed in the long run. 10 stocks we like better than Opendoor Technologies › Opendoor Technologies (NASDAQ: OPEN) is in the business of iBuying, which involves buying and selling houses. If the housing market is in good shape, then that can re ...