Not everyone values money the same way and there are people out there to whom $7,000 isn't a lot of money. So long as he's happy with his purchase...

To me he paid triple value on a lot of mediocre bikes and a few nicer ones that don't do it for me in an undesirable size.

After reading the ad, I'm not sure if the buyer is also purchasing the 20 boxes. I initially read it as they were available for a price, now I'm not sure. Maybe the buyer went over, took a look in the boxes and found 10 groups of 50th campy. Those 20 boxes could make all the difference in this case, and it doesn't mention how large those boxes are.