I had for one for ages, and it served me well.
The main thing to look out for is that the top guides are intact, although spares are available through metabo.
Ohhhhh....just looked at the price. Forget it. Too, too expensive for a second hand one. I'd expect to pay 100-150 max.
Another odd thing...the cut depth should be about 7 1/4" not 4"...Odd that. May mean a faulty guide bracket.