. >>> well, no one would dispute the artistic brilliance of vincent van gogh, but how much would youo see his art? some fine art buffs are desperate to see a popular bay area exhibit, and that, as don knapp shows us, has some seeing dollar signs. ka-ching. don? >> reporter: exactly, dana. three and a half months after this exhibit opened, about half million people later, it is still the hottest show in town, as evidenced by the scalpers. you don't have to be a high ground to appreciate this art. works of van gogh and other post impressionists. >> these are pictures we've grown up with on our refrigerator doors or nursery room walls. and it's a wonderful opportunity to see these really for the first and only time here in the united states. >> reporter: a wonderful opportunity, that, is for those who planned ahead and bought their $20 tickets, or $17 senior tickets, in advance. >> i got the special price. >> you know, you could probably get $80 for that today? >> i would love that! [ laughter ] >> reporter: demand remains so great that now through tuesday, the museum will open at 7:30