Speaker purchase question


I have been a member here for 22 years, but encountered something today for the first time and would appreciate your opinions. 
I bought a pair of used speakers on Agon and they arrived with no grilles. The seller is stating that the pics did not have grilles (true) and they were not mentioned in the ad. These Rega speakers did come standard with grilles originally. I thought that the pics were taken to show the condition of the drivers. When I asked the seller, he said that he had looked into buying new grilles, but since he didn't mention them in the ad, it should have been obvious they weren't included. 
Am I wrong to feel deceived? I want to be reasonable and would be interested to hear other opinions. 


mcp
Yes, The seller should have been more specific about what was being offered. And yes the op should have asked the question. The op did right by dropping thoughts regarding negative feedback and moved on. Lessons learned here.
I see points on both sides but, all things considered, I'm more inclined to give the seller the benefit of the doubt and, personally, would not leave negative feedback.
It's on the seller to provide an accurate description of the item for sale. 

If the buyer had known beforehand from the sellers description of a lack of all parts, there could have been a negotiation. 

Feedback: I'd note that the seller wasn't forthcoming in his written description and leave positive feedback with that caveat.
As the buyer of used goods, it is up to you to ask what you are buying especially when you cannot inspect the equipment  I have learned that when I purchased Alon speakers where the seller said the woofers were the Alnico models.  Years later when I needed to re-foam the surrounds, is when I found out that they were not - a $1600 option.

Live and learn.  You won't buy a used car that way would you or a home right?