I picked an 8x58 from one of the earliest batch, with a bore described as excellent.
Very soon after it arrived I called up TradeEx to complain; I'd picked up the rifle specifically to rebuild as a larger-bore BP rifle (deciding between .38-55 & .50-90), only, between the pristine bore & the condition of the rest of it I just couldn't bring myself to alter it in any way! Okay, maybe 'complain' isn't the right word, exactly, but I did call them and I may have bought a few more... The tang sight looks like a good plan, might have to explore that.
TradeEx have been fantastic to deal with. I fully agree with the comment above about them under-rating the conditions of their firearms. I have bought rifles described as having VG-Ex condition bores that I had to look over with a borescope for any signs of wear. They are probably the one business that I have dealt with on so many deals where I've had so few-to-no problems, and consistently great service. Pardon me for sounding like the old fart that I am, but that's lacking from so many other businesses these days.