Do you know of a good value guide on line for 78 shellac

I bought about 80 78 rpm shellac records from a collector. I used to know of a great guide on line where all you did was put in the record number and label (Columbia 36137) and the value would pop up. That was about a year ago. I have been looking for like an hour now and I can not seem to find anything like that. Wishing I kept the link.

Does anyone know of an on line guide like this? I want to look up the values of these records.

I appreciate any info.

 

Just popsike.com or collectorsfrenzy.com. The last good printed guide was the American Premium Record Guide by Les Docks, but the last edition was ~20 years ago. It's a good framework, but the prices are not even close to accurate anymore, especially with respect to premium pre-war blues records.