I collect the Imperial German sets. Guard Corps figures are very good. I find the level of detail in the sculpts to be very high. The quality of the finish is very good, particularly for glossy figures, though if I were painting the figures myself, I'd leave off the rosy cheeks, and I'd paint the eyes as more than a dot. But that is a very minor point. When Alan Silk and Ed Lober brought this range out back in the 90's, I was excited, because no one else made any Imperial Germans.
Of the Civil War/Seventh Cavalry range, I'll say the same thing about the quality. I have a single piece from those ranges, the Union officer kissing his wife or sweetheart good-bye (I think it's supposed to be Custer, but I don't have any catalog pages covering that range, except for one listing dismounted Union and Confederate cavalry). It's of the same quality as the figures in the "German Series", as they called it.
In my experience, Guard Corps are hard to find today. I see them from time to time on tables at shows, or on eBay. Unfortunately for us collectors, Alan and Ed weren't able to produce too many sets, before they each passed away and the partnership ended. There was a company in Hong Kong that revived the line, briefly, in the 2000's, and whose name currently escapes me. It was the company that did the casting for Guard Corps, if I remember correctly, and had some of the molds. I think either Alan's or Ed's family was involved in trying to keep the business going. I do remember seeing the website and the figures, but I don't think the venture went too far.
If I collected Civil War figures, I would certainly include Guard Corps' sets in my collection.
Prost!
Brad