I have been given the opportunity to make an offer on a jersey, before it is put up for auction, and would like to get some input from you guys on what a fair and reasonable offer - in your minds - would be.

The player is a future first ballot Hall of Fame pitcher, very near the end of his career, who was on a rehab assignment this year with the club's Triple-A affiliate.

The jersey is a nice road grey, and comes with a COA from the GM of the club.

What would you think an item like this would be likely to fetch at auction? If I buy it, I'm certainly not intending to ever re-sell it, but I want to make the current owner a fair offer without spending twice what I have to.

I'm actually thinking of something in the $400-600 range. Does that seem high, low, or somewhere in the ballpark, to you?