Including Zabala? Some guys have good luck with them; others not so much. Of course there's the issue of use vs abuse, but assuming guns of similar grade, in similar condition, I'd pay more for a V. Sarasqueta than a gun from the other members of the same clan.
Yes sir, including Zabala:
Zabala Hermanos, 20 & 28 gauge two barrel set, hand detachable SLE, $1400:

Zabala Hermanos, 12 gauge SLNE, $167.87:



Ascensio Zabala - Model 91, 12 gauge, light game gun, $290:



The last thing I look at is the name on the gun.
For me, the important things are:
1) What kind of gun (light game gun, medium game gun, live pigeon gun, trap gun, etc.)
2) Condition, condition, condition.
3) Approximate price point to which the gun was made.
4) Seller's probable price point versus the price point I'm willing to pay.
If I can get good answers on those four questions I don't care who the maker was. If I don't get good answers on those four questions I still don't care who the maker was :-)