Good morning, Ron,

Thank you for contacting Mearto with your appraisal inquiry.
This is a pretty unusual item - I've not been able to find any other examples of boxing round signs to have come up at auction so not entirely sure what kind of value these have, but think the best strategy is to value them conservatively so that they generate interest at auction.
Based on the photographs and information provided, and subject to examination, this is:

A Set of 11 Trump Plaza Casino boxing round markers
late 20th Century
each with a Trump Plaza crest, numbering 2-12, together in a box
30 by 32 1/2 inches
$100-150*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, and thank you for using Mearto.