Nailbender,
I have one my self in 22-250, I'd say the price for the .270 sounds to me like it's a little too high,the .300win mag is fair I'd try dickering with them, maybe offer $550.00 for the pair, Oh, one other thing to consider I had a AR-15 rebarreled and was talking to the 'smith and mentioned that I had one of these, and also told him that while the bore looks very bright, you can't hardly see any rifling, he told me that he has ran into this alot it seems that they (MarkX) uses a softer barrel steel than we use here in the states, and they wear quickly, my 22-250 usually groups about 11/4-11/2 at 100yds so it needs rebarreled, I bought it used so I'll keep it as a project rifle same smith also told me he had a once used 6.5x55 match chamber reamer left to him by a customer who bought it, Now, I'm thinking, Douglas S.S. bbl, 6.5 swede on a 98 action Hmmmmmmmmmm, ought to really be able to push'um out there anyway, check the barrels real well look and see if you can see the rifling, if it's hard to see it may need rebarreled,and this may give you some leverage on the prices