Need some advice from my RCM friends again

[simplechamp]

You guys gave me some good advice last time I had an issue with an RC classifieds buy/sell/trade deal, and now I could use some again.

Here's the deal: set up a trade with a guy on RC Tech, my MMP 1-cell and BEC for his MMM. He only has 2 feedback and I have almost 40 (100% positive, mostly selling). I told him I'd give him the benefit of the doubt, and as soon as he sent me a delivery confirmation I would send my item the same day. Everything was supposed to go out today.

Well I didn't hear anything all day, so I contacted him. He said he had someone (wife, girlfriend, mom, not sure?) send it out for him, but they forgot to get delivery confirmation. I told him that is OK, but because of that I'm not going to send my item until I receive the MMM. At first he said OK, but now he contacted me again and is pushing for me to send the MMP right away.

I feel it is perfectly reasonable for me to wait now, since he didn't follow the terms of the agreement. What do you guys think?