if you are gonna sell domain names, better post it on auctions or perhaps on Digital goods. no offence and just my opinion, the names don't really sound that good. sure, it is short, memorable, brandable etc... also, "flexi" doesn't really rhyme with "bet" because of the "i" at the end. anyway, as I said before it's just my opinion and if you want to sell your domain better post it on auctions or in digital goods.