14K on the clock. It has bags (panniers) and appears mostly stock from the pictures. What is the belt replacement interval? Are the '07's affected by the expanding gas tank issues? The seller wants $6250 (about 2 grand under book)

I might pull the trigger on a used 2007 DS1100.....it would be my first Ducati. What should I look for when inspecting the bike & service records? Are there any maintenance or warranty issues I should be aware of? Any other advise before I go check it out? Thanks in advance.