I had one, it shipped with the EOS-3000V SLR twin-zoom kit. It's a derivative of the 75-300mm lens and available with or without USM. 2nd hand probably about £75.
Suffers with flare and poor sharpness below F8 or when above 200mm.
Cheapest way to 300mm probably. Personally at this price range I'd pick up an old 70-210mm F4 which is in a different league IMO.