Hi, so maybe its a mis-price but this seems to be a cracking deal. This saw includes the new 2.0Ah battery, rapid charger and carrying case, at 129.99 but the bare tool itself is 124.99 on the same (ryobi) site? So you are getting a lot for that £5!
This is a new tool too, they've only released it over the past few months and the beauty of this tool which isn't advertised very well is that it plunge cuts too.
Seems to be a deal currently on, as the banner on the page indicates. The next best price i could find for just the BARE tool is 114.95 at direct power tools.
Hope this helps someone, i've ordered, thinking i can get about £40 for the battery (i just purchased the jigsaw and the drill tool for the batteries)... and another £20 for the charger.