Like Jay says, keep the one that shoots better, which may be the one with the better bore. I've owned many of these refurbs and what is truly rare is one with an excellent, unused looking bore. Also rare (but they do exist), is one that will shoot 1.5-2" groups right out of the box with surplus ammo- find one like that and it's a keeper. Other than functionality there's not really that much to distinguish one refurb from another. They have virtually no original parts on them (talking the Soviet refurbs, not the Bulgarian version).
As far as price is concerned, it amazes me how some seem to think that they should still be priced at the levels they were offered at when they were dumped in the market a few years ago. $600 to $700 IS the current price range in the private market and, as someone pointed out, commercial sellers seem to get much more for them. I'm going to sell a couple at the Spring show here in a couple of months and I can already hear the moaning about the prices being crazy high. I would urge potential SVT buyers to focus on the mechanical condition of the rifles and not make price the key issue.
milsurpo