Thoughts on this Deal Gone Bad

[Gob Bluth]

So here's the story, I posted the following for sale ad on another watch forum:

For sale is a D Serial (late 2005) GMT Master II in excellent condition with both a pepsi and coke bezel (both bezels in perfect condition). The watch comes with all paperwork, boxes, cloths, bezel protector, booklets, etc. This is the total package as you would receive from an AD. The bracelet is super tight and the crystal is perfect.

I spoke to the buyer on the phone and via pm and he never mentioned anything regarding the bezel inserts or bezel(s). Anyways, he received the watch today and I get a message saying the watch is beautiful but I misrepresented the package (essentially he only bought my GMT II b/c he thought it came with 2 bezels, one with the coke insert and the other with the pepsi insert). I'm refunding the money. Assuming a bezel costs roughly $500-$600+ I feel like it's a little ridiculous for him to have expected 2 separate bezels when I was asking $3800.

Is it wierd that this made my blood boil? Would anyone else assume that the above FS ad meant you were getting 2 separate bezels? I understand that perhaps I should have written "bezel inserts" and won't ever assume anything like that again.