It is the 2200 series (built in Japan) and does have a 45 watt RMS per channel power rating. Perhaps not a bad price, but remember it's from the mid '70's and could fail at any moment. I own several vintage marantz receivers and enjoy them, but you must understand that they can kind of go poof at any moment.
If it comes with a walnut cabinet (worth $100 on ebay), it's a good buy.
Wayner