What are the primary differences between these two rifles?  They look the same to me.  I was told by one guy that the SR9 comes with a match barrel and trigger.  Is that accurate?  Other differences?

Also, if I started to look for an SR9, what is the price range I can expect to find?  I know it will depend on condition, accessories, etc., but give me a range for a reference point.  TIA.

IIRC the SR9 series was the post 89 HK-91 import. They imported three models, 2 of which had thumbhole stocks. The match version was the only one with a pistol grip (PSG-1 style) because of it's 'sporting' purpose. In fact the SR-9 match model was one of the rifles used in the movie sniper.

The SR9s have a polygonal rifled barrel "heavy barrel" according to HK's sales brochure. Personally I wouldn't have even noticed it was heavy or not.  The HK91s have the standard lands and grooves.  OT: the HK22LR conv. kit barrel liner will not even go in a SR9 barrel. Also there is a heavier(litteraly) buffer in the SR9 buttstock. The trigger standard HK91.

The HK911 was the "postban" HK91... imported until around 11/90, I believe.

The SR9 has a polygonal bore, most HK91s do not (even though a few do).

The SR9 has no flash hider or muzzle device of any sort.

The SR9 has a different recoil buffer.

The SR9 has a standard HK91 trigger pack.  I belive the SR9TC came with the PSG1 pack.

as far as looking for one, i just wish you good luck.

SR-9:
Thumbhole stock, standard HK 91 trigger.

SR-9T:
PSG-1 Pistol Grip, MSG-90 Buttstock, PSG-1 trigger.

SR-9TC:
PSG-1 Pistol Grip, Buttstock and Trigger.

No longer legal to put PSG parts on an SR-9.

A basic SR-9 will generally run about $1500-1700 depending on condition, etc.  To put a pistol grip, etc. on it you would have to add enough US parts to be legal.  HK 91's are $1900 to $2100, SR-9T's about $3000 and SR-9TC's about $3500.

The PSG parts total about $1200 ($400 trigger, $600 buttstock, $200 pistol grip), accounting for some of the price difference (basic vs. T or TC configuration), the fact that it uses all factory parts with a pistol grip accounts for the remainder.

The  "T" and "TC" were stamped on the guns after import, so they don't quite match the SR-9 designation on the gun.  All of the guns ahve the polygonal rifling.

The SR-9 has the MSG-90 buffer in the buttstock, so it supposedly (I never fired mine before trading it for an HK 91) has a lighter felt recoil.

AFARR

PS--HK 91 is pre-ban, normally (except for a few guns in 1976 {I believe} has standard rifling.  Has a flash hider (none of the SR-9's do, or it would be a violation of the '89 import regulations).  

You could also have someone do a trigger job, which will lower the standard HK91 trigger pull from 10 pounds down to 6-7. I would recommend Williams Trigger Specialties, Alton IL. That way you don't have spend money for a PSG trigger. If you want to use the HK91 light bipod you will also have to get a new forearm, but keep your SR9 forearm, I understand that it is very hard to get.