We sell bitcoins at a slight discount and without any fees but I don't think anyone anywhere is selling Bitcoins at a huge discount.
Bitcoins are "cash". It would be like saying "hey where are the places people are selling Euros at 30% off. I know there are people who are willing to offer huge discounts on Euros to get dollars."
Bitcoins are fungible and liquid. Nobody needs to provide huge discounts.
I can vouch for Tangible Crypto!
He saved me A LOT of time by overnighting a cashiers check for what some would consider a "pretty decent" sum.
Saved me the time of trading 1-3BTC for the next few days to get my dividends consolidated.
FastCash4Bitcoins aside, you could always try your luck with
https://www.bitcoinary.com/Open a new trade and see if it can get filled.