What’s the least expensive way to have photos reprinted?

I’m talking about good quality 4″ x 6″ and 5″ x 7″ shots from my son’s wedding, plus a couple of 8″ x 10″s. I’ve got a Canon printer, but I think it costs more to print your own than to have a professional service do it. Snapfish sounded inexpensive at first but their shipping charges are high.
What about Staples? They said it cost about $0.49/photo for 4 x 6 s.
What’s the least expensive way to get quality photos printed?

Costco ( http://www.costcophotocenter.com ) is pretty cheap.

Winkflash.com, too. Their website is a pain to use.

Photo Reprints

Old VINTAGE Antique EXOTIC CURVY FRENCH Photo Reprint $5.00

JOHNNY DEPP SIGNED 8X10 AUTOGRAPH PHOTO REPRINT #003 $4.75

METALLICA BAND SIGNED 8X10 AUTOGRAPH PHOTO REPRINT $5.75

TYRA BANKS SIGNED 8X10 AUTOGRAPH PHOTO REPRINT $4.75

Harmon Killebrew 8 x 10 Photo with autograph reprint $0.99

Sandy Koufax [Dodgers] Photo with autograph reprint $0.99

CHRISTINA AGUILERA SIGNED 8X10 AUTOGRAPH PHOTO REPRINT $4.75

ANNA NICOLE SMITH SIGNED 8X10 AUTOGRAPH PHOTO REPRINT $4.75

Mickey Mantle & Hank Aaron Photo w/autograph reprint $0.99

GUNS N ROSES SIGNED 8X10 AUTOGRAPH PHOTO REPRINT #33 $5.75

GERARD MY CHEMICAL ROMANCE SIGNED 8X10 PHOTO REPRINT $4.99

Mickey Mantle 8 x 10 Photo with autograph reprint $0.99