I have the real answers why so many 05's are being sold. It isn't all that complicated, really. As Iggy already pointed out, there are more '05's than any other 1st gen bike. 1st gen bikes were PDP, which means that people bought them based on what they expected it to be like. Once they got them, some of the people decided they didn't really like it as much as they thought they would. These were the people that complained about things such as jerky throttle control, lean cruise surging, heat on their tender vittles, auto folding side stands, etc. These would be the low mileage '05's that you see.
Another segment of the PDP buyers found that they could put a PCIII on the bike, a heat blanket under the tank and a Cromeit block-off on the left side and the bike is a fabulous machine that lives up to their every expectation and desire. But then they came out with Gen2 and some of those 1st Gen buyers decided they'd like to "upgrade" their ride, so they too can enjoy ECU altitude sickness, defective ignition switch gear, melting ground junctions and other assorted electrical gremlins while still maintaining cool balls. Those would be the higher mileage '05's you see out there.
Another segment of the PDP buyers found that they could put a PCIII on the bike, a heat blanket under the tank and a Cromeit block-off on the left side and the bike is a fabulous machine that lives up to their every expectation and desire. But then they came out with Gen2 and some of those 1st Gen buyers decided they'd like to "upgrade" their ride, so they too can enjoy ECU altitude sickness, defective ignition switch gear, melting ground junctions and other assorted electrical gremlins while still maintaining cool balls. Those would be the higher mileage '05's you see out there.