We consider the problem of optimal bid pricing in an auction for cloud computing resource allocation. The multistage model connected with the full-information best-choice problem is investigated. In this model, users set bids as a sequence of thresholds at each step to minimize the expected resource rent price. A form of the spot price distribution function is proposed based on real-life Amazon EC2 spot price dynamics. The optimal bid values, mean instance rent price and average step for buying the resource were found through simulations. Copyright © 2020 for this paper by its authors.