Is It Worth Trying?

Hi all,
I've seen several of the 20th Anniversary ASE 3 coin sets with the first year reverse proof coin on ebay and craigslist for any where ranging from 375-475. Here's my question...In an effort to help pay for my hobby, I'm wondering if its worth it to buy a set like this, send it off to be graded and then re-sell it or them separately in PCGS or NGC slabs. It seems to me that if you find one that would grade PF70 you could easily double if not triple your money. I realize that grading is an expensive venture, but to me if you can make money at doing something like this then it's a no brainer.

Thess sets all seem to have the coins in a box and in airtight capsules...below is one such deal. I know the pics are bad, but do you think something like this would go PF70. I've done some looking around and even at PF-69 you'd at least make money back, maybe a little more, and you'd have some what of an education on the TPG grading game.