When I consider the price of a autogated tube i generally take the cost of that tube without gating and add 400-600$ to the price tag, because thats the typical cost to add autogating to a tube.
good point Steve on omni tubes not coming with spec sheets, ive updated this thread to state that and im including here and where ive stated a chart of the typical specs of contract tubes
http://www.ar15.com/forums/t_6_18/31...fferences.html
EDIT: this is what I have added:
*it should be noted that contract tubes (typically will be advertised as "omni <insert roman numerals/number here> ex: pvs-14 omni 4/ pvs-14 omni IV) do not have data sheets instead the different contracts (omni's) had to meet specific specifications, each batch of a specific omni run may or may not have had a different requirment, the following chart can serve as a baseline or average reference for each contract, but your specific tube may be above or slightly below this outline.
Notes about contract tubes:
-omni I, II, III tubes are hard if not impossible to find and are not worth your time and money if you manage to find one, modern day gen 2 is superior in almost every aspect (except photosensitivity)
-omni VII tubes may also be referred to as "pinnical" or "filmless"
-omni VIII tubes may be referred to as filmless or pinnical and are often incorrectly reffered to as "gen 4"
-it should be noted that omni VII and later tubes almost always come with autogating due to the fragility of the tube, which is both more fragile in its potential to be harmed by bright lights (although this is completely negated with autogating), and its physical resistance to shock (ex: recoil, being dropped), however omni VII + tubes produce greatly improved images
Contract (omni) tube spec sheet reference: