I would third anyone who is waffling. For Xmas 2008 I plunked $125 for a beef tenderloin around 9 pounds.
From that I pulled 8 magnificent filets. My two nieces and I did up four filets at rare and four more at medium for their living grandparents and the rest of the family. Just that was pricelss at 125/8 = $15.62 each. Just the tears on grandpa's face, crap man, I scored that year. Those eight were each so tall in the skillet that the bacon didn't reach all the way up. And the nieces will never forget making grandpa cry.
I also made a hash out of the trimmings off that thing 12-26AM, jeez. Just go to your meat counter, find the old guy and ask....ask how much if he cuts big thick crazy filets out of it and dices the rest for you...
Learn to pan roast (brown in skillet, finish in oven) with medallions of pork tenderloin. You won't break the bank if you screw those up.