There are others selling the same chip for lots less, even under $15. Seems like a case of one seller hoping to hit a home run.

http://www.ebay.com/itm/5-00-Millennium-Chip-New-York-New-York-Las-Vegas-NV-/161187172440?pt=LH_DefaultDomain_0&hash=item2587811058

http://www.ebay.com/itm/5-New-York-New-York-Casino-Chip-Millennium-2000-/261412061352?pt=LH_DefaultDomain_0&hash=item3cdd5f80a8

One sold last week for around $20
http://www.ebay.com/itm/NEW-YORK-NYNY-CASINO-LAS-VEGAS-5-2000-MILLENIUM-CHIP-Lot-of-4-chips-/111262700842?pt=LH_DefaultDomain_0&hash=item19e7c6152a

And one in January for $10
http://www.ebay.com/itm/LAS-VEGAS-NEW-YORK-2000-NEW-YEAR-5-CASINO-CHIP-/141136149347?pt=LH_DefaultDomain_0&hash=item20dc5ebb63