Shaw119 What a counterfeit brings at auction is always conjectural. It depends on who see's the coin and who has interest in the particular variety. I have purchased similar counterfeits for as little as $25 and have had to pay well over $100 for others. I have not done a detailed comparison for an exact die match with all 6 of my examples, however, if for example it used one different die it would fall in the over $100 category - if both dies were "new" varieties to me I would go higher.
This field of collecting is still maturing. Very little data exists on actual numbers of coins that exist and even less hard data exists on how solid the collector market actually is.
My book on Counterfeit Portrait 8Rs is available from Amazon http://ccfgo.com/TheUnrealReales
or from me directly if you want it signed.