Re: world war 1 pistols.
All those "Ruby" pistols fall into the $75-150 range, with an exceptionally nice one going for $200 or so, more if with the accessories. The problems are that many are broken, missing parts, or in poor condition. The original quality varies from good to somewhere below awful, with Gabilondo, the original contractor, probably the best or at least close to it.
The French were desperate and took anything that would shoot and after WWI some of the makers continued to produce pistols of the same general type again of varying quality.