I think you need to show those guns to a real expert.
A 4-digit A5 is certainly a jewel; especially if it is a high-grade **factory** engraved gun and the finish showing in the picture is original and not a reblue. Unfortunately, Belgian Browings blow kind of hot and cold in the market and it seems that they are currently at kind of a low level in price and demand. Around here, at any rate. Your area might be different, or it might be of interest on a national market.
But let's get down to the serious stuff. An Owen Springfield is REAL interesting. Bob Owen was one of the premier custom gunsmiths and sporterizers of the '03 Springfield in the 20s and 30s. Does it look anything like this one?
Now THERE is a gem.
Edited, the first link I tried would not work. Try
http://www.griffinhowe.com/usedgun-rf.cfm
and go down the list to R.G. Owen