If I had your choice to make, I'd examine both your 710 and this frame critically, and see if there are significant differences in workmanship, in your opinion. Then I'd build up the Guerciotti, at least minimally, and ride it around for awhile, before getting rid of it. The Columbus SL Guerciotti with no chrome became their 2nd-tier bike, certainly by the time they started building them with SLX; but it's still a made-in-Italy Guerciotti, and that's worth something to somebody, even with paint issues.