I bought this pair of 1969 OPC stamps on eBay a number of years ago. They are still attached with the tab. About a year ago I saw a few listed that had been graded. They were PSA 7 and were selling for $100-$150, which shocked me. I finally had this pair graded and got a PSA 9! Only 3 of this pair have been graded, according to PSA.
I have no idea what this might be worth and haven't found anyone who could give me any answers. Any vintage insert collectors out there have any info on these or have an educated guess?
Here is a scan: