will it fit? seat question

[xRAY76]

another question for the pros...

i have a 60 c10, that has a later model bench seat (74-86)
originally i wanted to go back to a deluxe 60 seat, but thats been proven hard to find around here.

anywho...

i have the chance to grab a 2000 GMC bucket seats with shoulder belt, and center small seat (like a buddy bucket), i know i have seen pix on here with these seats in our trucks, but my question is, how well do they fit?

the guy is parting out a wreck, and wants an offer of course. they are black and look in decent condition, the truck does'nt have doors so they have seen some weather. what should i pay?

thanks