Your comments

We don't have that feature at this point.  I think it 's a good idea though.

We used to have this feature but closed it down years ago.  

https://blog.pricecharting.com/2013/02/closing-dvd-blu-ray-pricing-site.html

In our experience, most DVD's aren't worth very much and very few are worth a bunch of money.  There wasn't much demand for a price guide when we had it on the site.  Things might have changed over the last 10 years but I still buy most of my DVD's for $3 or so and hardly ever see ones worth more than $10 so I don't think this is a market we will be jumping into soon.

Yes that would be technically possible.  I'll see how popular this feature request is before implementing it.

Sorry for this problem.  If you enter a blank space character instead of leaving it blank does that solve the problem?  This will help me troubleshoot the issue and find a solution.

This should be fixed now.  Sorry for that oversight.  

Are you referring to something like this:

https://www.ebay.com/itm/134104214988

If not, please give me a link to the item online somewhere and I'll look to add it.