Can you help me better understand and price this old camera?

Husband inherited this camera from his grandfather, who was an avid photographer. I am wondering if it is worth hanging on to or trying to sell.

 

May be close to this one. https://picclick.com/Antique-Wollensak-135mm-Raptar-Rapax-Lloyd-England-Large-312427377955.html

 

Medium format, looks like sheet film. Mechanically pretty simple. No clue what it's worth now.

 

There seems to be a fairly robust interest on eBay. Here's a list of sold items, but they may not all exactly match yours:

https://tinyurl.com/2p93whvx

Grandpa got some good use out of this. I would inspect it for obvious issues such as tears in the bellows, especially at the corners/seams. See if you can tell if it's missing any parts based on the link above (you'll need to do your due diligence on this)