I need a barcode terminal device for access controls workflow, this device needs to be connected to a web-application. In other words I need what can be a browser and a barcode scanner together. Price limit 500$
The Motorola MC40N0 provides an android-based barcode scanner system which can access web applications via the android browser wirelessly. It includes a barcode scanner, laser scanner, camera, and magnetic strip reader. Software to utilize the scanning methods should come stock on the included Android ROM, otherwise you'll have to buy a license from Motorola, which will ruin your budget. An older model, it can be found on the used market for cheap.
I owned two of these devices, having found them in a dumpster. After charging them up, both worked fine, though one had a battery that wouldn't charge. Their OMAP 800mhz dual core ARM CPUs were somewhat slow, but sufficient for the job, and the devices were incredibly efficient and long-lasting.