What should I look for when I look at a frame?

[Ana]

I found a frameset (yes, frame and fork only) on craigslist that I am going to look at this weekend (3/21 or 3/22). I am inexperienced in technical biking topics, although I am trying to gain knowledge all the time

Any specific things I should look for? Is it a good brand? What do you think I could expect from the built-up frame?

Here are the details:

De Bernardi 47cm (490mm c-c)
Lugged Steel
for 700c wheels
Head tube: 71
Seat tube angle: 74
Stand over on 700c wheels: 28.6 inches
Seat tube diameter: 26.8 inches (which is what makes me think it's old)
some cosmetic scratches and scrapes

I think the person who is selling it has a pretty good grasp on technical aspects of bikes, as he was going to build it up for his wife but she decided not to ride anymore. He sent me lots of pretty pictures and the inside is clean but unprotected (ah, frame saver, frame saver!). He bought it at a swap meet 6 years ago and has been stored inside (heated-oooOOooo)

Should I take it to a local dealer to have them take a look at it? The seller is traveling about an hour round trip to show me the frame (I am covering his gas cost unless I purchase the frame) and I feel unprepared to make an on-the-spot decision. It would be completely different if the frame was built up and I could take a spin on it but...alas, no such luck

I'm hoping to have it built up and possibly replace my current aluminum frame.

Any thoughts or advice would be greatly appreciated

Thank you for sharing your wisdom