I stayed in paris by airbnb around 3 times.
With this price Marc's house will be one of the best. I am sure.
He's house located in nice building with lift (important for traveler with luggages!). what i really liked was there is a big window with little terrace. room is small (enough for two). i was so suprised everything is super (!) well equipped. Everything! and the information paper which he made for us is quite impressive... :-) bus, walking map, restaurants..
Thanks for Marc for agreeable,detail communication. and he's friend also.
I was happy to stay your house. Good luck with you. : - )