javimm
Established
The $60 for the F2 and lens is low by about half of what you might pay on EvilBay, maybe a little more. Being a resale shop and needing to make money $60 is reasonable. There are alots of them on the market these days.
I think the folks here have the problem with you setting the original price. If you found it for $60 at a garage sale you would be a hero. But she came into you for help and guidence and that is where you took the wrong turn.
I'll play a little the devil advocate's role.
I think you summed it up with this two phrases perfectly. Having a balanced opinion here is difficult. If someone offered you a 35 'Lux for 50 €... well, I doubt very little people would say, "hey man, charge me 2000 € for it, I don't want it for 50 €. I don't want to rip you off". At least it's hard not to do it.
I agree too that the woman should have researched the prices. Second hand photo stores are like that. If you don't know what your gear is worth, they rip you off. Information is the key.
I'm not saying that she deserved to be ripped off, but with an attitude like that she is going to be ripped of sooner or later. That things happen everyday. Is it bad? Yes, but it's how life goes.
That kind of low offers happens all the time, but you have to be informed.
Maybe it's my point of view due to my job, where everybody I deal with is trying to extract the maximum benefit from me to the point of trying to rip me off, and I have to keep them honest (and try to get the maximum benefit from them too 🙂 ).