My offer began for a 3.5* in the Philadelphia (Convention Center - Mid Center City) Zone. Began bidding at $65 expecting the Marriott to hit. It failed. Tried a few more bids upping the offer by $10-$15 at a time. All failed until I reached $100 and I saw I was upgraded to a 4* at this price. Would have preferred the Marriott at $65 but I'll take it. I hope for better results next time. Thanks for the web site. It is excellent.