Might be a decent find. The temp rating is hotter than water or wort can even get, so that's good. One thing you might want to check on is the line that says "food standard materials at request". Is that something you have to ask for, and will it make the price go up?
The first downside I see after a quick scanning of the listing is the flow rate of 6.5 liters/minute. That's about 1.7 gallons/minute... if you are just pumping horizontally. The flow will be less than than this when you have to pump it vertically.
Secondly, you will need a 12V DC power supply to drive it.
PS: Lately, people are starting to turn away from the march 809 and towards some pumps from Little Giant for brewing, but... march 809's are probably still the most widely used ones at present.