I think I may have misunderstood this a bit, and now understand. Let me explain what I did for a recent LA bid (see LA forum). Wanted zone A 4*, there were zones B, C, D, E, F available without 4*, and as free rebid. So I did A AB ABC ABCD ABCDE ABCDEF and the bid was still rejected. So I closed my browser and restarted with AC but was told that I had a bid using this combination already (no other combination worked either). So if your bid is a subset of a bid you made in the last 24h, your bid won't be accepted. So to get most free rebids you have to restart your browser a lot more often (actually after almost every bid with a few exceptions when you go to one more zone) and do A AB close browser AC close browser AD close browser AE close browser AF ABF close browser ABC close browser ABD close browser ABE close browser ACD close browser ACE close browser ACF close browser ADE close browser ADF close browser AEF ABEF close browser ABCD close browser ABCE close browser ABCF close browser ABDE close browser ABDF close browser ACDE close browser ACDF close browser ACEF close browser ADEF ABDEF close browser ABCDE close browser ABCDF close browser ABCEF ABCDEF So with 5 rebid zones you can get up to 30 rebids on PRICELINE.