Very common. While not seen too often on US ebay for awhile, it shouldn't be that tough to find one for a reasonable price. Even mint ones shouldn't be more than $100 for standard colorway. The SAU models on the other hand... ouch. High prices shouldn't be seen on plain US models... it only the more exotic stuff like Greek, Russian, other colorways that demand higher prices. ISO models on the other hand can often be found starting at 1EUR.