I've seen a couple of Beats recently up for silly money. Are these things going up in value or are people just trying to fly a kite?

There is a yellow beat on ebay now with steel wheels and aftermarket stereo and steering wheel (so not exactly desirable) for £6,495, and a silver one with aftermarket wheels, stereo and steering wheel for £5,500.

I thought the going rate was about £2-2500 for a decent one with original parts, a bit more for the z-series, going down to about £1000 for anything with aftermarket parts?

Stu