Andre,
We have them in our book, "Cruise Ships and their Casino Chips". The white $.25 chip we have listed at $1-$2. The grey $1 at $3-$4, the brown $2.50 at $20-$24 and the red $5 about the same as the $2.50 However, I am sure some would pay more than that if they really needed them. Hope this helps.