What's going on with this? Price guide drop.

I went to show my wife the price guide that I found last night for the MBX Superfast Type 3. When I loaded it today it’s dropped by about $100! This dosent bother me as I’m not looking at selling anything and realise these things probably aren’t that accurate. I was able to find and screen shot yesterday’s result and posted that and today’s result below. But if it’s not accurate what’s the point of it? I still think yesterday’s price was a fluke and if it was worth over $100 I would be amazed.

Have a strange looking 911 from a company known as ‘Yatming’ for your time. It’s scale is not known to me but it’s smaller the HW/MBX buy a noticable amount but not tiny.