Only the current version so far — new entries appear as the app ships updates.
BookTrapper: Sell Textbooks is a productivity app by Wade Technologies with 10,000+ downloads (about 13K estimated). +9 installs in the last 7 days. Rated 4.0 from 94 ratings. Released May 17, 2017. Install growth, rank history, SDKs and ad networks.
From the store listing: “Scan ISBNs, compare textbook buyback offers, and find the best place to sell.”