Unique Apple products, vintage gear, prototypes and documents signed by Steve Jobs often fetch thousands of dollars at auction, and RR Auctions is launching a new round of rare Apple products starting today.

A working Apple Model 1 computer is up for auction and could fetch up to $300,000. This machine was known as the "Bevier" Apple-1 and is ranked No. 91 on the Apple-1 registry. The Apple-1 was the first computer sold by Apple co-founders Steve Jobs and Steve Wozniak, and is available in limited quantities.

Apple-1 is well preserved, labels are clear, and the circuit board is not peeling off. It also comes with an original manual with handwritten instructions from Daniel Kottke, Apple's 12th employee.

There are also two checks signed by Steve Jobs that could sell for upwards of $25,000, and a rare Apple II computer with a Rev. 0 logic board and ventless chassis that could sell for as much as $30,000.

Several EVT (Engineering Verification Test) prototype devices are also up for auction, such as the Macintosh Portable with a transparent housing. Released in 1989, the Macintosh Portable was Apple's first battery-powered laptop. Because it weighed over 16 pounds and was expensive, it wasn't a huge success, and there are only a handful of them on the market, and even fewer prototypes with clear cases. Given the rarity of the device, it can fetch upwards of $50,000.

PowerMacG4Cube, PowerMacintosh and MacintoshTV, all of which can cost thousands of dollars.

All Apple devices for sale can be found on the RR Auction website.