I have received many emails about this chip. I purchased this chip several weeks ago from a guy in Vegas. It is the only one I have. He said this was the only one he had. I have seen three on eBay this year. I asked that seller (Dangerupclose) if he had any more. He said he did not. I researched this chip before buying it and found that there are a few more in collections. TCR lists it as a Z4 ($2100-$3099). James' price guide has it at $6000-$9000-$12000. However, it also says there is only one unnotched example known. We now know this to be wrong. If anyone here on the Chipboard has one, let me know and I'll report my findings.