O-2's at KGXY

[Danger Mouse]

Hi Everybody
I am hoping some of you out there can provide me with some inside info on the O-2's for sale by a well known Denver salvage yard at Greeley-Weld County airport in Colorado. I have not been able to get much info off the net other than there are 7 a/c there and they have been sitting in the open for a number of years. I notice 4 of them are still on the N register. Apparently the aircraft were flown to Greeley but not used since by the looks of the photos.
If anyone has an opinion on the condition of these machines or on the work required to return one to service I would love to hear from you. I am planning a trip to Denver in January and wondering if it is worth a trip to Greeley.
Thanks in advance
DM