Can anyone give me a hand with the trading value of the following obsoletes:

Sahara cardroom - $1, blue, hat and cane, hot stamp; Sahara 25cent pink, h&c, hot stamp; Dunes card room non-negotiable $1 - beige, horse mold, hot stamp; Dunes same 25cent maroon; Caesars cardroom $1 - blue, h&c, hot stamp.