Need help pricing

I have a pair of Orion short tubes ED extra low dispersion in good condition. I was asking $160 for the pair; it was suggested to me by an astromart viewer that this price is too low. Your comments/suggestions are appreciated.
Thank you.
Susan BeVille
Ocala, FL

Attached Image:

Condition? Where are the focusers? What else is missing? Lens?

Keep in mind these look like the Vixen ED's that Orion carried a few years ago - not the Orion/Synta 80mm ED that they currently carry. The Vixens are worth quite a bit more. You do not state the size - but assume they are the 102mm (that's what they look like to me) - my guess is if the lens is in excellent condition 3-500 each....With that said, the "market" would be the ultimate deturmination - and no better place then the "Auction" function here on A-mart.

The blue lettering says "ED - extra low dispersion".

Susan