[woodnthings]

I own one like it, mine is a 13" wide model and it is a great workhorse of a thickness planer. However, I've never used the molder setup, but it looks easy enough to do. I have removed and sharpened my blades several times over the years and that is also easy enough to do. It does require a setup "jig" to get them all the same and equal height above the cutter head. You Tube will show how it's done. Mine has a 3 HP, 240 volt Baldor motor, and yes, it is noisy when running, but it has a different sound than a high speed cutterhead like a lunchbox type. It will plane just about anything you run through it and making moldings on it could become a financial asset!
This is like mine:

 

[woodnthings]

How much would one of these be worth? Just dug one out of my dad’s garage.

I wouldn't sell mine for less than $1200 IF I chose to sell it! It's a 3 HP beast and I just used it 2 days ago on some 7" wide by 10 ft long Oak. If you have any plans to do woodworking for yourself, keep it, use it and see how you like it.
It's a bit "clanky" and makes some noise when under way, but always produces a nice finish on my rough sawn boards.
It does not compare to a lunch box planer like the Dewalt 734, or 735's in my opinion. The molding function is unique and a benefit for serious woodworkers.