calling all eBay gurus!

So this is the same message I posted on the eBay boards just a few minutes ago. I know there must be someone (or a few people!) on fchat who are insane eBay-ers, and can give me some advice as what to do. In fact, even if you don't eBay, let me know what you think. OK, heres the message.
I bought a pair of Nike shoes (item # 270251315886) from kmwfootwear, who's feedback looked good. The seller shipped them out to me, and when they got here, I found out they were to small. No big deal, my fault, I check out the seller return policy on the page, which is all fine with me. So I package the shoes on up, contacted the seller (all communication with seller has been via eBay) and sent them to the location provided to me by him, along with a note for the correct size (11.5) along with $10 in cash (big mistake), his restocking fee and where to send the new shoes.

So I waited for a while to get the new pair of shoes, and nothing. So I send kmwfootwear an eBay message asking how long the shipping normally takes, he responds about 7-12 days. Thats fine, but then I wait for 3 weeks, and still nothing. I send him another message, and nothing happens. No response, nothing. So after about a week I start an item not received claim, cause I'm out $95. I tell him my situation, and he provides me with the tracking number for the first pair that he shipped. I tell him that yes, those were the ones I sent back, I'm wondering where the ones are that I sent them back for. Then another week goes by. I post a reminder in the Not received dispute, and still nothing. It has been two months to the day since I bought these shoes, and I have nothing to show for it, except the $95 that I'm out.

I've tried to find his contact info., but nothing came up, so I've just requested it through eBay. I was just wondering what I can do, or if its just a hard lesson learned?

Reason for edit: Posted wrong item number.

 

thanks all. Unfortunately things are not looking good for me right now. I know the $10 cash is gone, and I made a couple of mistakes during this process.
1. Buying shoes on eBay. I do not recommend this to anyone, next time I know I'll just go to a store, even if they don't have the exact pair I want.
2. Sending the 10 in cash. That was just dumb.
3. Not requiring signature or tracking number for postal service. Although I didn't know that I would need them, when returning things online from now on, I will always put out the extra 3 bucks to do this.
4. eBay has told me that they are also looking into this seller, so it's likely that I won't get the shoes.
5. Paying online in debt card. I've contacted PayPal, and this money is gone to. When I buy online from now on it will only be in CC.

And I have contacted eBay for this seller's contact information. If I get this, I will be calling him as often as I can, and shooting him an e-mail every ten minutes.
Again thanks everyone for all the advice and support.