Robert Taylor rare prints for sale

Apologies if i have put this in the wrong section.
I have some rare signed R.T prints that I have unfortunately have to part with, including a very rare one signed by Erich Hartmann.
I would be appreciative if anyone could point me in right direction of where the best place to advertise them would be, i’ve had no luck via ebay. They are worth a great deal of money and do not want to let them go for peanuts.
Thanks guys.