Your price is very low for the ranking, service you are providing, why you selling it for 100 dollars, looks a great project, i understand you need time to manage it, how do you collect those 80 dollars , and make 50 profit, host costs you 30 monthly as i see, kindly provide a bit more details. Does this website has applied to adsense?
No only the starting bid is $100, His buy now price is $1000. So its up to him whether to sell for lower than $1000 dollars or not, this is the way bidding works in flippa, so that he can easily calculate the worth of his website price and sell accordingly. Its an advertising site like adsense so adsense will not approve it (I think so)
But i used flippa for getting traffic, I had my website for sale of $20000, which gives me approx 5000 visits per month from flippa