Length of OME 884 coil

Does anyone know the length (measurement) of the Old Man Emu 884 coils? Looking to buy a pair off craigslist and don't want to get scammed into buying OEM springs. Any other way to tell these are legit?

 

Emu 884 has 590lb spring rate and is 390mm in length.

883 = 590lb spring rate ,375mm in length
884 = 590lb. ,390mm length
885 = 590lb. ,395mm length
886 = 660lb. 402mm length
887 = 590lb. 400mm length

 

If they don't have a tag that says OME884X I wouldn't buy.

Also if they have a tag, make sure they have the X designation in the spring model.

If it doesn't have the X they're an older coil, and the X models are less prone to sag.

 

Thanks for the info fellas. I guess I'll order new just to make sure; no sense in trying to pinch pennies where it counts. FYI here is the ad..

http://denver.craigslist.org/pts/5552371702.html