I started bidding at $65 with no wins for a 4 Star. Finally won at $75 at the IP. Be forwarned that Taxes and hotel fees for Biloxi Coastal total $50 for two nights.
I started bidding at $55 and increased my bids by $5 until i reached $70. At that point I increased bids in increments of $1 until bid was excepted at $72.