I have found a new (but off warranty) 6.8SPC Robinson Arms XCR-L conversion kit.
What do lightly used/off warranty kits typically go for on the EE?
I read a while back that some barrels had a less than optimal twist rate and/or headspace issues.
Any information would be appreciated.
Check the stamp towards the front of the barrel.
I believe early 6.8 kits did not have the 1/11 twist rate.
here is info about 6.8 barrels, robs arms (both styles) are included
https://spreadsheets.google.com/pub?key=tOtyqlb35yLitvWlWWajZyg&output=html
if it is the older style barrel is a 1/10 twist rate, check here. They are a spec II chamber, allowing for faster speeds/hotter loads, but the twist rate is not optimal.
http://68forums.com/forums/showthread.php?18774-Remington-6.8-SPC-Guide.
as for pricing-new kits go for $750.
how many mags do you have?
what condition is the finish in?
approx how many round are through it?
ask what you think is fair, keeping in mind that there is not a 10% up-charge for "breaking the barrel in properly" haha
hope this helps.