This is not an absolute auction. I have no idea what it is worth today, but I would think it would be highly sought out when Tiger is an old man. I will have to search for autographs and check some values. (You should have made me an offer before I researched it)
Side story - Wally Goodwin, Tiger's Golf Coach in college (this man is a trip and a heck of a story teller), (Wally and my brother go back a few years) had a bunch of Tiger stuff, and a well known sports reporter asked to see one particular item - he wanted to copy it into a story for SI. Wally, being technologically challenged, thought nothing of it and dropped it into the mail to the reporter after getting the reporter's promise to return it. The reporter claimed to have never received it. The "it" was a letter which Tiger wrote during the 8th grade to Wally stating how much he wanted to play for Wally at Stanford.
Edit: just did a quick search and I didn't see any of Tiger's autographed stuff for under $1000 and most of it is junk -- mine is the actual menu from the Clubhouse (I was working the Champion's Dining Room during the tournament. While Tiger wasn't a previous champion, he did get to eat in the dining room.) Heck, maybe I should search for Arnold Palmer's too.