Showing Restraint

I am trying to complete the 2010 Topps Magic Jersey set. Each card is serial numbered to just 25 copies. I have chipped away at the set to the point of needing only 17 of the 73. When one appears on eBay or other card buying sites, I am quick to try and pick it up. Except this one.

This Darrius Heyward-Bey card has been listed in D and P Sportscards eBay store for over 3 months. The seller has not budged on the price, $25 bucks. Doesn't it cost money to list cards? At what point does it become un-profitable to keep re-listing a card at a ridiculous price? Yes, I know, there are only 25 of these around. It's Darrius Heyward-Bey, the first round bust though. It ain't a twenty five dollar card any way you slice it. The same seller has a Cedric Benson from the same set with a BIN of $10 bucks with $2.50 S&H. I offered him the same amount, $12.50. His response... "Our price is firm!". Yes, he used an exclamation point. I probably wouldn't have bothered you all with this minor sportscard collecting tid-bit if not for the unnecessary use of an exclamation point.
Now go have a good day. Thanks for reading!