Wait another month and a half and you can get them for $5. The only thing is they are junk. The prongs that hold the umbrella open are made of wood not metal, the post is wood also, they will break in a 20 mph wind. If they have the metal prongs they are much better. They are good enough for summer time fishing when there is little or no wind. Anything to keep the sun off you.
I found some at BIg Lots that were made with metal pole and prongs and it lasted 5 years of heavy use. Only thing is the colors are a little loud. I think I paid 15 bucks and the base stand was included.