1935 silver cert

I am new to paper money, but was at an auction yesterday and 12 - $1 1935 certs went for $40. Is that a good deal (did not know to look for color of stamp). I looked 1935 certs on eBay and prices seemed to be all over the place. What are the good ones and what are they worth.

 

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It all has to do with condition, serial number, condition, centering, condition, eye appeal, and did I mention condition.
1935 $1 SC's should have blue seals. The majority of 1935A $1 SC's also have blue seals, but some emergency notes (Hawaii & N.Africa) have brown or yellow seals.

 

It's hard to argue against $2 over face for any note really, except for say 1990 and later issue.