Well
There's always discrepancy between 'asking' and sold for. I can ask for my Sunfire amp also $8k, but it does not mean I'm going to sell it at that price. To get better idea I'd look for more than just one source the 'sold for' statistics.
Even if the units aren't around for the price described there may be the time that they will be listed.
For example:
http://audioconsultants.com/equipment-Conrad-Johnson-Premier-350SA-5264
There's always discrepancy between 'asking' and sold for. I can ask for my Sunfire amp also $8k, but it does not mean I'm going to sell it at that price. To get better idea I'd look for more than just one source the 'sold for' statistics.
Even if the units aren't around for the price described there may be the time that they will be listed.
For example:
http://audioconsultants.com/equipment-Conrad-Johnson-Premier-350SA-5264