River Valley Herps/Feeders aka Dave Watkins?

This is an inquiry~ not a posting as to good guy or bad guy status.
I am hoping to complete a transaction with or failing that return money to:
Dave Watkins (I *think* that was the last name) DBA River Valley Herps and/or feeders at rivervalleyherps@gmail.com
We entered into an agreement n January 2015 to purchase:

BP-14-10 possible het clown female
BP-14-25 Piebald female
BP-14-23 Piebald male
BP-13-10 Het piebald female
Total of $650
Plus $80 shipping
Shipped total of $730

Sent payments via paypal of:
Jan 22 $100
Jan 31 $75
March 11 $200

Leaving a balance of $355

I have not heard from Dave in over 2 months~ I have sent him emails twice in the last week asking if he is ready to complete the transaction and ship the snakes and I have not heard back from him.

I'm kind of not sure what to do now. I'm inclined to send him a refund (less the fees paypal charged so the refund would be $363.22) but he was getting a very good price on three of those snakes and I'm a bit concerned he will be angry if I send back his money and re-list the snakes. But really~ it's been a very long time now.

Whats the right answer?
Wait a little longer?
or
Refund the $363.22 to the address that sent the payments and re-list the snakes?

River Valley Herps has a Facebook page with a telephone number. https://www.facebook.com/RiverValleyHerps/timeline

David and his wife also have Facebook pages, they're not hard to find. Maybe something happened to his email so you can try reaching either of them through FB.

I don't know this gentleman but a quick Google pulls up a Facebook page.

https://www.facebook.com/RiverValleyHerps/

His phone number is listed here as 304-551-3837. You maybe could try reaching him at that number. It hasn't been updated since November, though.

I hope you find him. Good luck!

Thanks
I left messages at the phone number and on the facebook

on the date of this inquiry 5/21/15 a third party sent me $75, when I inquired why I was informed it was a refund meant for mr watkins that he asked be sent to me. I found this confusing and annoying, I called left messages and sent emails to mr watkins informing him I was unhappy with the lack of communication and that I felt this transaction needed to be completed or I would refund his payments minus the paypal fees. It has been another month without a single responce from mr Watkins so I am returning his money today~ I have sent $438.22 to the email address which sent all but the last payment from the third party.

I am hoping this will be the end of it but I figured since I had started this inquiry I should follow up with the resolution.
Thanks