Yeah, I know.  Tough card.  I have a 4 and would prefer a 5/6 (or even 7) in my set.  If you have one and you're itching to sell, let me know.  Can also trade my 4 and cash for yours as well.  
PM or email 
tbrambo@yahoo.com if you'd like to discuss (no, the PSA 4 isn't for sale).
Thanks!