I have collected antique pocket knives for 30 years and have looked at countless thousands of old knives, also have owned and researched many old cutlery catalogs. NEVER have I seen an older Shapleigh marked knife that was made in Germany. If they were genuine old knives "from a warehouse", I would think that I would have seen at least one orignal example by now. I have seen original Simmons knives marked Germany but not Shapleigh.
I would agree with previous posters, quality is probably good, in line with Bulldog (IMHO, probably off the same production line).
As far as the "values" claimed in the $250 range or whatever, those are values made up by Jim Parker, the same person selling the knives for the lower prices.
You would probably get similar quality and perfromance from a bulldog for a lower price. Bulldogs are amazing values for the money if you buy direct from Parkers.